Walter Burley
From the Beginning of His Treatise on theKinds of Supposition (De suppositionibus)
5

Translated from Stephen F. Brown,“Walter Burleigh’s Treatise De suppositionibus and Its Influence on William of
Ockham,” Franciscan Studies 32 (1972),
pp. 15–641

10Translated by Paul Vincent Spade,
Department of Philosophy, Indiana
University, Bloomington, IN, 47405<On the Kinds of Supposition according to Walter Bu rley>2
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[Introduction](1) (p. 31) (1.1) “Some things that are said are said with complexity,
and others are said without complexity.”3 Those that are said without complexity are, for example, ‘man’, ‘animal’. Those that are said with complexity are, for example, ‘A man runs’, ‘An animal runs’.4(2) It is plain from this that the incomplex is part of the complex.
And because a knowledge of the part is very helpful for knowing the whole,
therefore in this treatise we must talk about incomplex [expressions] and theproperties of incomplex [expressions] — that is, about supposition and appellation. For the knowledge of these is very helpful for knowing the
proposition, and consequently for knowing the syllogism.
1

I have here translated the first part of Burley’s text (pp. 31–43), on the
supposition of “absolute” terms, but not the remainder (pp. 43–64), on the supposition of“respective” or “relative” terms and other material. (See paragraph (18) below.) Page
breaks have been inserted in parentheses. Parenthetical numerals with decimal points are
Brown’s paragraph numbers. My own paragraph numbering is in boldface.
2
Here and throughout this translation, pointed brackets enclose Brown’s editorial
additions. My own insertions are enclosed in square brackets.
3
Aristotle, Categories 2, 1a16–17.
4
Latin has no indefinite article, so these sentences might also have been translated‘Man runs’, ‘Animal runs’. Throughout this translation, I have added or omitted indefinite
articles as seemed to me to fit the sense best. Readers should feel free to renegotiate them.

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2
(3) ‘Incomplex’ in this discussion is taken not only for a simple
word, as the term ‘man’ or the term ‘animal’ is [simple]. Rather‘incomplex’ in this discussion is taken for anything that can be an extreme5in a proposition, whether it is an extreme put together out of an adjective
and a substantive or whether it is an extreme put together by means of conjunction6 or by means of disjunction.7(4) (1.2) It is [my] intention to treat briefly the kinds of supposition
and appellation. (These are the properties of terms in propositions.) But before we talk about the kinds of supposition, let us see which terms supposit
and which ones do not supposit.
[Which terms have supposition?]

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(5) You have to know that a part of an extreme does not have supposition. Rather supposition belongs to the whole extreme. Thus, an inference need not be valid because of a relation between parts of the extremes.
(6) It is plain from this that the inference ‘You are running to theinn; therefore, you are existing at the inn’8 is not valid. For even though‘running’ is inferior to9 ‘existing’, yet the extreme ‘running to the inn’ is notinferior to the (p. 32) extreme ‘existing at the inn’.
(7) Nevertheless, I am not saying that an inference is never valid
where there is a relation [of inferiority and superiority] between the parts ofthe extremes. I am saying rather that one should not conclude that an inference is valid because of a relation between parts of the extremes. For ‘You
are seeing a man; therefore you are seeing an animal’ is a good inference.
Here there is a relation [of inferiority and superiority] between the parts.
But the inference does not hold because of this, but only because of the relation between the [whole] extremes and because ‘seeing a man’ is inferior
to ‘seeing an animal’.

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An “extreme” or an “extreme term” is the subject or predicate of a proposition.
‘Conjunction’ = copulatio. Here the term has nothing to do with the “copula” ofthe proposition, as it often does. Instead it refers to the ‘and’-operator that produces“copulative” (= conjunctive) propositions.
7
Presumably Burley doesn’t mean to exclude “simple words” from being“incomplexes,” but only to emphasize that “incomplexes” are not confined to simple
words.
8
The preposition in both the antecedent and the consequent is ‘ad’, so that the
only difference between the two propositions in Latin is in the participle. The second
proposition is just a verbose way of saying that you are already at the inn.
9
‘Is inferior to’ = (roughly) is narrower than, is contained under. The idea is thatrunning implies existing, but not the reverse.
6

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(8) From this it is plain that an inference like ‘You are a good thing;and every good thing is a good cleric or non-cleric10; therefore, you are agood cleric or a good non-cleric’11 is not valid. [For] although it follows12: ‘You
are a thing; therefore, you are a cleric or non-cleric’, nevertheless it does notfollow: ‘You are a good thing; therefore, you are a good cleric or a good noncleric’.13 For ‘You are a good thing’ is not inferior to ‘You are a good or nongood cleric’. This is plain because when I say ‘You are a good thing’, the[word] ‘thing’ that I say does not have supposition, because it is a part of theextreme.14(9) Likewise, the inference ‘You are Socrates’s pupil; and every15 pupil
is a man; therefore, you are Socrates’s man’ is not valid. Neither is it valid:‘You are Socrates’s something; and you are nothing [else] but a cleric16; therefore, you are Socrates’s cleric’. For positing that you were Socrates’s master,
the antecedent would be true and the consequent false. This inference is defective, because when I say ‘You are Socrates’s something’, the term ‘something’,
insofar as it is a part of the extreme, does not have supposition.
(10) For this reason too, (p. 33) ‘You are Socrates’s something; therefore you are Socrates’s cleric or Socrates’s non-cleric’17 does not follow.
(11) (1.21) But there is a doubt about extremes put together by means ofconjunction or disjunction. Does a part of an extreme have supposition in suchcases? If it is conceded that they do, then18 ‘Three men and no more than three
men are here indoors’ would be true.19 For it would follow: ‘Three men and10

Omitting Brown’s editorial addition ‘bonus’.
Omitting an ‘es’ in the edition.
12
Conjecturing ‘sequatur’ for the edition’s ‘sequantur’.
13
Omitting an ‘es’ in the edition.
14
I can make no sense of the example as it stands in the edition. The apparatus to
the edition records several serious variants, suggesting that the scribes couldn’t makesense of it either. I have fixed things up as best I can. Nevertheless, even fixed up, theexample does not illustrate at all the same point as the preceding example, despite what
Burley seems to be suggesting in the penultimate sentence. In the previous example, it
was a question whether the inferential relations between terms are preserved when thoseterms are embedded in larger expressions. Here it is a question whether adjectives can be
distributed over disjunction.
15
Following a variant in the edition.
16
The ‘nothing [else] but’ seems too strong here. It is open to the rejoinder: “Oh
yes I am. I’m also Socrates’s master.” (See the sentence following the inference.)
17
Omitting an ‘es’ with a variant in the edition. See the comment on this kind of
example, n. 14 above.
18
Following a variant in the edition.
19
The explanation in the remainder of the paragraph makes it clear that we are
implicitly assuming that there are in fact exactly five men here indoors.
11

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two men are here indoors; therefore, three men and no more than three are here
indoors’, since two men are no more than three.
(12) Likewise, it would have to be conceded that ‘Every man is an animal’ has three true singulars and no more.20 For it would follow: ‘It has threetrue singulars; and these are no more (pointing to two [of them]); therefore, it
has three true singulars and no more’.
(13) Likewise, one would have to concede that Socrates and Plato are
non-Socrates and non-Plato. For it follows: ‘Socrates and Plato are Socrates
and Plato; therefore, Socrates and Plato are non-Socrates and non-Plato’, because ‘Plato’ is inferior to ‘non-Socrates’ and ‘Socrates’ is inferior to ‘nonPlato’.
(14) So [too], ‘Some non-men are a man and a non-man’ would have to
be conceded, or at least ‘Some [things]21 (p. 34) are a man and a non-man’,from which ‘Some [things] are a man and are not a man’ follows.22(15) (1.22) It has to be said that no part of a composite extreme has supposition in the composite extreme. Nevertheless, in some cases an inference
does hold from an inferior to a superior. But this is not on account of an ordering between the parts of the extremes, but only on account of an ordering between the extremes [themselves]. The reply to the arguments [in (11)–(14)] is
plain from this.
[The definition of supposition]

25(16) (2.01) Now that we have seen that a part of an extreme does notsupposit, we must talk about kinds of supposition. You have to know that any
term, and whatever can be an extreme in a proposition, whether it is an adjective23 or a substantive, whether [it is] complex or incomplex, every such thingcan supposit. From this it is plain that ‘the substantive designation of a thing’24
20

That is, there would be only three true propositions of the form ‘This man is an
animal’ (pointing to different men in each case), and so only three men who were animals.
In fact there are many more than that, and this is the point of the example.
21‘Some [things]’ = aliqua, the neuter plural pronoun.
22
What argument Burley has in mind here is anyone’s guess. Try this: Socrates
and a tree stump are a man and a non-man (respectively); therefore some things are a man
and a non-man, since ‘Socrates’ is inferior to ‘thing’ and ‘tree stump’ is also inferior to‘thing’. Burley’s hesitation at the beginning of the paragraph is harder to motivate. For
while ‘tree stump’ is inferior to ‘non-man’, ‘Socrates’ definitely isn’t. Perhaps the point
rests on whether calling a pair of things ‘non-men’ implies that neither of them is a man
or only that they are not both men. But it is not clear how that has anything to do withwhether parts of extremes have supposition.
23
In Latin, neuter adjectives can (and often do) stand alone as subjects.
24See, e.g., L. M. De Rijk, Logica Modernorum: A Contribution to the History of
Early Terminist Logic, (Assen: Van Gorcum, 1962–1967), Vol. II: The Origin and Early
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is not a suitable definition of supposition. For supposition belongs no more to
the substantive than to the other.25(17) Therefore, it needs to be said that supposition is a property of an
extreme according as one extreme is ordered to the other in a proposition. Andso supposition does not belong to an extreme outside a proposition, but only ina proposition.
[The primary division of supposition]

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(18) (2.1) Supposition is divided, because one kind is proper and another kind is improper. This is the first division of supposition. A term supposits
properly when it supposits for something for which it is permitted to supposit
literally.26 But a term supposits improperly when it supposits for something
metaphorically and from its use in speech.
(19) Now first we must talk about proper supposition, first in absolute[terms], then in relative ones.
[The division of proper supposition](20) (p. 35) (2.2) Proper supposition is divided. One kind is formal andanother kind is material. Material supposition is when a term supposits for anutterance.27 This is of three kinds. For it either supposits (a) for an utterance
only (it supposits this way in ‘Man is a monosyllable’), or (b) for an utterance
together with the relation to [its] significate (it supposits this way in ‘Man is anoun’, because the utterance alone is not the noun, but rather the aggregate of
the utterance and the relation to the significate), or else (c) it supposits for anutterance together with the relation to [its] consignificate28 (it supposits like thisin ‘Man is in the singular number, ‘Cato’s is in the possessive case’).
(21) Yet it has to be understood that a term does not always supposit
materially when it supposits for an utterance. For if that [were] so, then when I
say ‘Every utterance is an utterance’, the subject would supposit materially, beDevelopment of the Theory of Supposition, Part Two: Texts and Indices, (1967): (a)Logica ‘Ut dicit’, Tract. VII, p. 408: “And supposition is the substantive designation of athing, that is, a certain property of a substantive term”; (b) Logica ‘Cum sit nostra’, Tract.
V, p. 446: “And supposition is the substantive designation of a thing, that is, a substantive
term’s signification.”25
On manuscript adds the marginal gloss ‘the adjective’.
26‘Literally’ = de virtute sermonis = “by the force of the discourse.”
27‘Utterance’ = vox. The translation almost always conveys the right sense, even
if it is not very graceful.
28
For present purposes, the notion of consignification as used here is sufficiently
illustrated by the examples that follow.
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6cause the subject is distributed, or supposits, for the utterance ‘utterance’.
Likewise, when I say ‘Every noun is a part of speech’, the subject would supposit materially, because the subject supposits for any noun at all, and so for thenoun ‘noun’.
(22) Thus in some cases the thing signified by an utterance is superior to
the signifying utterance. And in that case when such a term supposits personally, it supposits for an utterance. But it does not follow from this that it signifies materially unless it supposits for itself only, or only for itself together withthe relation to [its] significate or consignificate.

10[The division of formal supposition](23) (2.3) Supposition is formal when a term supposits for its significate or for a suppositum.29 Formal supposition is divided, because one
kind is simple and another kind personal.
[The divisions of simple supposition]

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(24) Simple supposition is divided, because sometimes a term supposits for its absolute significate, and sometimes for its significate [as]compared with [its] supposita. (p. 36) And so simple supposition is of two
kinds. One kind is absolute, and the other kind is compared. Absolute supposition, as here: ‘Man is the worthiest creature among creatures’,30 andcompared supposition, as here: ‘Man is a species’. For a universal has two
conditions. One condition of it is “being in many,” and the other is “being
said of many.” According as a universal has “being in many,” absolute supposition belongs to it. And according as it is “said of many,” simple andcompared supposition belongs to it. Thus, according to the one supposition‘Man is a species’ is true, and according to the other ‘Man is the worthiest
creature among creatures’ is true. Otherwise ‘The worthiest creature among
creatures is a species’ would be true.

29‘Suppositum’ has both a logical and a metaphysical usage. In the logical sense,
it refers to whatever a term supposits for. In that sense, it is tautological to say a term
supposits for its suppositum, and this is not what Burley means here. In the metaphysicalsense of the term, the supposita of a term are the individuals that fall under it.
(‘Supponere’ = literally, “to place under.”) Thus Socrates and Plato are supposita of theterm ‘man’ in this sense. It is the latter sense that Burley has in mind here.
30
This just means that man is the worthiest creature of all. The odd wording
suggests that the example is perhaps a literal translation of a common syntacticalconstruction in Arabic. Nevertheless, I know of no discussion of this proposition in theIslamic logical literature. I would welcome further information on this topic.
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(25) (2.31) You should know that according to simple and absolute
supposition ‘An ox is promised to you’ is verified. Positing that someone
promise you an ox, by saying ‘I promise you an ox’, then ‘An ox is promised to you’ is true. And yet neither this ox nor that one [is promised], butrather the thing signified by ‘ox’. And that can be delivered by delivering
any suppositum indifferently. Thus whoever gives you an ox gives you thething signified by the term ‘ox’. And he cannot deliver this common[significate] to you otherwise than in a suppositum of it.
(26) Likewise, according to this supposition, ‘He is deprived ofsight’ is true, pointing to a blind [person]. For he is deprived neither of mysight nor of your sight. The cause [for this] is that he is not born to have mysight or yours.31 Yet he is born to have the thing signified by the term‘sight’. And therefore the blind [person] (p. 37) is deprived of the common[entity] “sight,” but is deprived neither of this sight nor that one.
(27) (2.32) You should know that a general term having species andindividuals under it can have two kinds of simple compared supposition.
For it can have general or special supposition. When it has general[supposition], then it supposits for [its] significate absolutely so as not forany suppositum. And according to this supposition, ‘Substance is a mostgeneral genus’ is true. But when it has special simple supposition, then it
supposits for species so as not for individuals. And in that case ‘Substanceis second substance’ is true. Thus ‘Substance32 is second substance’ is true
according as the subject has special simple supposition.
[The divisions of personal supposition]

2530(28) (2.4) Personal supposition is divided. For one kind is common,
and another kind is discrete. Common supposition is where a common term
supposits for some numerically one suppositum. Discrete supposition iswhere a discrete term supposits.
(29) You should know that among discrete terms one kind is simple
and one kind is composite. And I call33 a term “simple” not because theutterance is simple, but because it has a simple significate. In [the case of] adiscrete simple term, simple and personal supposition do not differ. Rather
such a term suppositing simply and suppositing personally supposits for
entirely the same [thing].
The expression ‘born to …’ indicates a kind of natural aptitude that may
nevertheless fail to be actualized in practice. Colloquial English preserves the same usage
in phrases like ‘born to lose’, ‘born to be blue’.
32
Omitting ‘first’ with a variant in the edition.
33
Following a variant in the edition.
31

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(30) Nevertheless, a composite discrete term supposits for one[thing] when it supposits simply and [another] when [it supposits] personally. For when it supposits personally, it supposits for a simple singular. But
when it supposits simply it supposits for its significate.
(31) For example, positing that Socrates is white and runs, ‘White
Socrates runs’ is true according as the subject supposits personally. And inthat case the term ‘white Socrates’ supposits for (p. 38) Socrates. And so a
composite singular supposits for a simple singular.34 Thus ‘White Socrates
runs’ is true because Socrates runs. And according to the same supposition‘White Socrates of necessity is Socrates’ is true. But when such a term supposits simply, it supposits for its significate. And in that case ‘White Socrates is a being by accident’ is true. For the thing signified by the term ‘white
Socrates’ is a being by accident.
[The division of common supposition]

15(32) (2.41) Common supposition is divided. For one kind is confused and another kind is determinate. Determinate supposition is when acommon term supposits distributively for its supposita, as in ‘Some man
runs’. Thus I understand the same thing by “determinate supposition” andby “distributive supposition.”35

20[The division of confused supposition]

25(33) Confused supposition is divided. For one kind is merely confused supposition36 and another kind is confused and distributive.
(34) A term supposits merely confusedly when it supposits for several things in such a way that it is implied by any of them and one can descend to none of them [either] copulatively or disjunctively. ‘Animal’ supposits this way in ‘Every man is an animal’. For it is implied by [its] supposita. For it follows: ‘Every man is this animal; therefore every man is an
animal’. But it does not follow: “Every man is an animal; therefore every

34

That is, a composite singular term supposits for a simple singular thing.
The use of ‘distributive’ here is perhaps surprising. Do not confuse“distributive” supposition, in this sense, with “confused and distributive” supposition as
described below.
36‘Merely confused supposition’ = suppositio confuse tantum, or morecommonly, suppositio confusa tantum. Literally, this is “supposition only confusedly” or“only confused supposition.” But the phrase ‘merely confused supposition’ is by now
well established in the secondary literature, and I have retained it here.
35

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man is this animal’, and it also does not follow: ‘Every man is an animal;
therefore every man is this animal or that one’.37(35) (2.411) You need to know that a syncategorema that conveys amultitude has the power of merely confusedly confusing a term that mediately follows.38 In accordance with this, it is plain that the following aretrue: ‘Twice you ate some bread’ [and] ‘Three times you ate bread that you
did not three times eat’.39 Neither does it follow from the latter: ‘Therefore,
three times you ate this, which you did not three times eat, or three times
you ate that, which you did not three times eat’. But this is true: ‘Threetimes you ate that, which you did not three times eat’.40 For once you ate
37

The sentence is carelessly formulated. First of all, it gives no explicit example
of descending “copulatively”. Nevertheless, from the fact that ‘Every man is an animal;
therefore every man is this animal’ does not follow, we know that ‘Every man is an
animal; therefore every man is this animal and every man is that animal’, and so on, does
not follow either. (This last is what is normally meant by “descending copulatively.”) But
second, provided one understands the second inference in the text as implicitly
continuing: ‘… therefore every man is this animal or that one’ and so on for all animals,that inference does follow. What doesn’t follow, and what Burley presumably means here
instead, is ‘Every man is an animal; therefore every man is this animal or every man isthat animal’, and so on for all animals. Ockham (and some other authors) make a sharp
distinction between descending to a disjunction of propositions and descending to adisjoint term. See Paul Vincent Spade, “The Logic of the Categorical: The Medieval
Theory of Descent and Ascent,” in Norman Kretzmann, ed., Meaning and Inference inMedieval Philosophy, (“Synthese Historical Library,” vol. 32; Dordrecht: Kluwer
Academic Publishers, 1988), pp. 187−224. As discussed there, the appeal to disjoint terms
is by no means an Ockhamist innovation; it is found in fact long before Burley.
Nevertheless, Burley routinely uses disjoint terms where it is obvious that he intends thelonger disjunctive propositions. (See, e.g., nn. 43, 48 and 50, below.) This fact suggeststhat he is merely speaking in abbreviated fashion, and that the notion of disjoint terms is
simply not on his mind at all.
38
‘A term that mediately follows’: That is, a term that follows, but is not the firstterm that follows. Part of the point here is that the scope of operators always extends totheir right. This is sometimes just as artificial in Latin as it sounds in English, and yet it isa convention that lives on in modern symbolic notation (reverse Polish notation excepted).
Although this convention is often applied quite rigorously in mediaeval logic, Burley does
not always observe it strictly. See, e.g., n. 54 below.
39
The point is that twice (or three times) you ate (different pieces of) bread, eventhough there is no piece of bread that you ate more than once. The logical point is welltaken, but perhaps it is best not to visualize the example too vividly.
40
Again, this is carelessly put. If it is true, then the consequent of the preceding
example is true too. Burley’s point is presumably not that the preceding inference isinvalid even though both the antecedent and the consequent are true. Matters can perhaps
be fixed by deleting an ‘illud’ in the Latin, and translating the last sentence: “But this istrue: ‘Three times you ate what you did not three times eat.’” But this does not conform to
the wording in the explanation that follows.
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that, which you did not three times eat, and another time you ate that, which
you did not three times eat, and a third time you ate that, which you did notthree times eat.41(36) Now it is plain that this [claim42] is true, because otherwise‘Twice you ran’ would be false. For it follows: ‘Twice you ran; therefore,(p. 39) twice you ran a run’. Therefore, unless the adverb ‘twice’ had thepower of confusing the term that follows, it follows: ‘Twice you ran a run;therefore, twice you ran this run or that one’,43 which nevertheless is nottrue.
(37) From this it is plain that ‘Every head does what does not haveevery head have’.44 For the first [occurrence of ‘head’] supposits merely
confusedly.45 The truth of this is plain, because each singular is true.46(38) (2.412) It needs to be understood that when a syncategoremathat conveys a multitude is part of an extreme, it does not then have thepower of merely confusedly confusing a common term that mediately follows [it]. For example, when I say ‘[One who] sees every man is an animal’, ‘animal’ does not stand merely confusedly in this [proposition]. Thisis because ‘every’47 is a part of the extreme.
(39) Now it is plain that ‘animal’ does not stand merely confusedly[in this proposition]. For it follows: ‘[One who] sees every man is an animal; therefore [one who] sees every man is this animal or that one’, and soon.48 That it does follow is plain. For it follows: ‘[One who] sees every man
is an animal; therefore an animal is [one who] sees every man’. And fur41

The three ‘that’s here refer to distinct things you ate.
At the beginning of paragraph (35).
43
What Burley means is ‘Twice you ran a run; therefore, twice you ran this run or
twice you ran that one’, and so on. See n. 37 above.
44
I’m sorry, but a lot depends on the word order in the Latin. The sense is thatevery head is such that something that does not have every head has it. (This is because
nothing has every head; we each have our own heads, thank you very much.)45
Although what Burley says is correct, it is not clear how it is supposed to beplain (as he also says) on the basis of the claim at the beginning of paragraph (35). For the
first occurrence of ‘head’ in the example does not mediately follow any syncategorematic
term conveys a multitude. The only word it follows is ‘every’, and it follows that
immediately, not mediately.
46
That is, given that nothing has all heads at once, and ruling out decapitations,each proposition of the form ‘This head does what does not have every head have’ is true.
(It amounts to ‘This head is had by something that does not have every head’.)47
Conjecturing ‘omnem’ for the edition’s ‘homo’, which does not fit the example.
The edition shows no variants here.
48
Although this inference is valid, in order to make his point Burley needs to saythat it follows: ‘[One who] sees every man is an animal; therefore [one who] sees every
man is this animal or one who sees every man is that one’, and so on. See n. 37 above.
42

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ther: ‘Therefore this animal is [one who] sees every man or that animal is[one who] sees every animal’, and so on.49(40) (2.413) Furthermore, it is plain that this inference is not valid:‘Whenever some species existed, some suppositum of it existed then; therefore whenever some species existed, this or that suppositum of it existed
then50; but ‘Always the species (p. 40) man existed’ is true51; therefore always some suppositum of man existed’.52 And each of ‘Always this suppositum of man existed’ and ‘Always that suppositum of man existed’, andso on, is false. For a multitude is conveyed by ‘always’, for which reason a
mediately following term is confused merely confusedly.53(41) From this it is also plain that if in each instant of this day someman is here indoors, in such a way that one man is here indoors for thewhole day,54 but different ones successively, so that now one and then another, [then] ‘For the whole day some man is here indoors’ is true and‘Some man for the whole day is here indoors’ is false.
(42) (2.414) You have to know that if a syncategorema that conveys
a multitude has the power of confusing a term in the same categorical, nevertheless a syncategorema that conveys a multitude and occurs in one categorical does not have the power of confusing a term occurring in anothercategorical. When I say ‘Every man is an animal and some man is he’, theterm ‘man’ occurring in the second categorical is not confused by the preceding quantifier, and therefore the whole [proposition] is false on accountof the second part. 55

49

To make this work, one needs the implicit premise that propositions of the form
‘One who sees every man is this animal’ are “equivalent” (in a suitably strong sense) tothe converse ‘This animal is one who sees every man’. Such an equivalence seems
unobjectionable.
50
Rather, ‘therefore whenever some species existed, this suppositum of it existed
then or that suppositum of it existed then,’ and so on. See n. 37 above.
51
At least according to Aristotle.
52
To fit the first part of the inference, one would have expected ‘therefore always
this or that suppositum of man existed’, interpreted as ‘therefore always this suppositumof man existed or always that suppositum of man existed’, and so on. See n. 50 above.
53
This doesn’t explain why each of the singulars in the preceding sentence isfalse, as Burley’s wording suggests, but rather why they don’t follow from ‘Always some
suppositum of man existed’.
54
According to the convention about scope mentioned in n. 38 above, one would
have expected a different wording here: ‘for the whole day one man is here indoors’. In
fact Burley puts it exactly like this later in the sentence.
55
The example is confusing, and I am not sure exactly what Burley intends here.
But I suspect ‘he’ in ‘some man is he’ should be ‘it’ (‘istud’ for ‘iste’), with ‘animal’ as
the antecedent. The edition shows no variants here. Against this reading, however, note
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512(43) Likewise, neither does a universal negative quantifier occurringin one categorical have the power of confusing a term occurring in anothercategorical. Thus when I say ‘No man is an ass and some animal runs’, theterm ‘animal’ occurring in the second categorical has determinate supposition.
[The division of confused and distributive supposition]

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(44) (p. 41) (2.42) Confused and distributive supposition is divided.
For one kind is mobile and another kind immobile. [It is] mobile when acommon term has supposition and the power of distributing and one candescend to some suppositum of it.56 [It is] immobile when a common term
supposits for its supposita and one cannot descend to these supposita. The
term ‘man’ supposits in the latter way in ‘Every man besides Socrates runs’.
For the term ‘man’ is distributed, and one cannot descend to a suppositum.
For ‘Every man besides Socrates runs; therefore Plato besides Socrates
runs’ does not follow.57(45) Thus you need to know that when one cannot descend to the
supposita under a term that has supposita, and neither is the term that has
supposita implied by [its] supposita, then the term supposits confusedly
and58 distributively immobily. This is plain in the example given above, orin ‘No man besides one of these is an animal’, pointing to all men. In this[proposition] the term ‘animal’ supposits confusedly and distributively immobily, because it neither is implied by [its] supposita nor implies them. It
does not imply them, because ‘No man besides one of these is an animal;
therefore no man besides one of these is an ass’ does not follow.59 Neither
does ‘No man besides one of these is an ass; therefore no man besides one

that in (2.615 — not translated here) Burley explicitly says that the subject of the second
categorical does have merely confused supposition.
56
Following a variant reading in the edition.
57
The point is not that it doesn’t follow that Plato runs, but rather that ‘Plato
besides Socrates runs’ is not well-formed.
58‘Confusedly and’: Following a variant reading in the edition.
59
In order to understand the example, you need to realize that (pointing to allmen) ‘No man besides one of these is an ass’, according to Burley, amounts to ‘No man
other than one of these is an ass and one of these is an ass’. That is, an “exceptive”
proposition does not merely stand neutral on the exceptional cases; it says of them the
opposite of what it says about the others. See Burley’s De puritate artis logicae tractatuslongior, Tract. 2, pars 3, particula 2, Ch. 2, in Walter Burleigh: De puritate artis logicae
tractatus longior, with a Revised Edition of the Tractatus brevior, Philoetheus Boehner,ed., (“Franciscan Institute Publications,” Text Series no. 9; St. Bonaventure, NY: The
Franciscan Institute, 1955), p. 165.23–33.
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13of these is an animal’ follow. For if it did, it would follow: ‘No animal
besides one of these is a man; therefore no animal besides one of these is a
substance’. Yet there the antecedent is true and the consequent false.61
60[Mobile confused and distributive supposition]
510(46) (2.421) About confused and distributive mobile supposition,
you need to know that a term does not always supposit confusedly and distributively mobily when one can descend to the supposita, unless this is byreason of a distribution. For it follows: ‘Some proposition (p. 42) is true;
therefore this proposition is true’, pointing to ‘Something is true’.62 And so[too] for anything that follows from ‘Some proposition is true’. And yet the
subject of ‘Some proposition is true’ does not supposit confusedly and distributively, because the descent does not come about on account of a distri-60

This confirms the claim that the confusedly and distributively immobily
suppositing term is not implied by its supposita. Note that both the antecedent and theconsequent are false here (and in fact impossible), for the reason given in n. 59 above. The
claim that the inference is invalid is puzzling, since Burley explicitly accepts the rule
“From the impossible anything follows.” See his De puritate artis logicae tractatuslongior, Tract. 2, pars 1, Ch. 1, p. 61.6–16. He does, however, say there that suchinferences are generally “accidental” and not “natural simple inferences,” since theantecedent does not “include” the consequent. (Inclusion here appears to be some kind of
relevance relation.) See the remainder of the paragraph here for why Burley thinks theinference is invalid.
61
The ‘these’ in the example can be taken as indicating all animals, or as
indicating any group of animals provided that all men are included. Note that, unlike thepreceding example, the antecedent of this inference is true but the consequent false. (Seen. 59 above.) Burley’s reasoning seems to be that if the previous inference were valid, it
could only be because of the relation of inferior to superior between the predicate terms of
the antecedent and the consequent. But that such a relation is not enough is shown by thelast example. Therefore the previous inference is invalid.
62
Omitting several words in the edition, following a variant reading. As it stands,
the edition has: “For it follows ‘Some proposition is true; therefore this proposition istrue’, pointing to ‘Some proposition is true’. Likewise, it follows: ‘Some proposition istrue’, pointing to ‘Something is true.” (I have italicized the words included in the edition
but omitted in the variant.) Brown has the variant marked as a homoeoteleuton, but I think
the text makes better sense without the words. For note that despite the italicized‘Likewise it follows’ above, the subsequent words are not an inference. Perhaps we could
construe the ‘Likewise it follows’ as meaning that what follows is a consequent of thesame antecedent as before. That would be technically correct, since the sentence justrepeats the antecedent. But note also that there is no demonstrative to do the “pointing” in‘Some proposition is true’. It may be possible to sort all this out, but I think it is much
more plausible to follow the variant reading and just omit the italicized words entirely.
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bution but from a necessity in the thing. Thus, supposition is never confused and distributive unless this is by reason of a distribution.63(47) (2.422) Thus, mobile confused and distributive supposition iswhen by reason of a distribution one can descend to some suppositum. Distribution is conveyed by a universal affirmative quantifier, and also by syncategoremata and by other [expressions] that include an exercised negation.
Thus the verb ‘differs’ has the power of confusing a term confusedly anddistributively.
(48) (2.423) But there is a doubt about a term that supposits confusedly and distributively mobily. Can one descend to [just] any suppositum of
the term64? It seems not, because — pointing to Socrates and Plato —‘Either of these, if it is Socrates, differs from Plato’ is true, taking this as
being about a conditioned subject. This subject is said truly of each ofthese, because each is one of these, if it is Socrates. And yet one cannot descend to [just] any one, because in that case it would follow: ‘Either ofthese, if it is Socrates, differs from Plato; therefore, each one differs from
Plato’.
(49) Likewise it follows65: ‘Either of these, if it is Socrates, differsfrom a white thing; therefore each one differs from a white thing’.66 For
each is one of these, if it is Socrates.
(50) (p. 43) (2.424) It must be said that the whole [expression]‘either of these, if it is Socrates’ cannot be distributed by the quantifier‘either’.67 Neither is a term distributable by the quantifier ‘either’ unless it
has two supposita only. And even then not.68 For a69 term that has two supposita
only can<not> be distributed by the quantifier ‘either’, unless these supposita
are pointed to in its distributable, as in ‘Either of these runs’, pointing to63

Note that the beginning of the of the paragraph was about mobile confused anddistributive supposition. Although the restriction to mobile supposition has been dropped,
it is presumably still implicitly understood.
64
That is, to each and every one of them.
65
That is, it follows if we can descend to each and every suppositum. Apparently
we are still pointing to Socrates and Plato.
66
Suppose Socrates is black and Plato white.
67
The first ‘either’ is ‘alterum’ in the Latin, whereas the second is ‘uterque’. In
fact, the preceding example had ‘uterque’. I am assuming that nothing rests on this slightdifference of wording. Burley is in effect here denying that we have a case of confusedand distributive mobile supposition, so that the examples in (48)–(49) are no evidence
against the claim that in such supposition one can descend to each and every suppositum.
68
That is, even that is not enough.
69
Omitting an ‘uterque’ from the edition. I can make no sense of it here.
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Socrates and Plato. Thus ‘either of these, if it is Socrates’, is not to beunderstood — unless only ‘being of these’ is distributed.70(51) (2.425) You have to know that a universal affirmative quantifier confuses an immediately following term confusedly and distributively,
and it confuses a mediately following term merely confusedly. But a universal negative quantifier has the power of confusing both a mediately following term and a term immediately following it confusedly and distributively. Thus when I say ‘No man is an animal’, both ‘man’ and ‘animal’supposit confusedly and distributively.
(52) But it has to be understood that this rule is to be understood [asholding] when the universal negative quantifier is referred to the formalcomposition. But when it is negates a material composition only, it does nothave the power of confusing the extremes of the formal composition, as
when I say ‘No man’s running is a truth’. Taking this in the composite
sense, the term ‘true’ is not confused. For it does not follow: ‘No man’s
running is a truth; therefore no man’s running is this truth “God exists”’,
because the antecedent is possible and the consequent impossible.71
70

The entire paragraph is obscure, but I confess I can make no sense of the end of
it. The business about ‘being of these’ apparently means that we are to understand ‘eitherof these, if it is Socrates’ in the sense of ‘either being of these [i.e., either being among
these], if it is Socrates’. But what difference that should make I do not know. Also, why
are the two supposita of ‘these’ not “pointed to” in ‘either of these, if it is Socrates’,
whereas they are in ‘Either of these runs’?
71‘No man’s running is a truth’ = Nullum hominem currere est verum. The
example is hard to translate well, since it relies crucially on Latin syntax. Latin routinely
uses accusative-plus-infinitive constructions (such as ‘nullum hominem currere’) in
indirect discourse. English typically uses a ‘that’-clause (‘That no man runs is a truth’),but sometimes also the accusative-plus-infinitive construction (‘They want him to leave’)or an accusative-plus-infinitive construction introduced by ‘for’ (‘It is desirable for him toleave’). But in the present case, in order to see the point of the example, we need to havethe universal negative quantifier ‘no’ at the very beginning of the sentence, as in the Latin.
That yields two possible readings: (1) No man’s running is a truth = it is true that no man
is running, or (2) No man’s running is a truth = the truths do not include even a single
case of a man’s running. The former reading is the “composite sense”; the subject term is‘no man’s running’, and the ‘no’ there is part of the subject term, not a quantifier added tothe subject term. The proposition is therefore a singular (or perhaps indefinite) affirmative.
The latter reading is the “divided sense” (although Burley does not discuss that sensehere); the subject term is ‘man’s running’ or ‘(a) man’s running’, and the ‘no’ is now readas a quantifier added to the subject term, not as part of that subject term. The propositionis therefore a universal negative. The “formal composition” in a proposition is thecomposition of the main subject with the main predicate. In addition, some propositions
have a further “material” composition — that is, an embedded subject-predicatecomposition within the subject or the predicate of the whole proposition. In the“composite” reading of ‘Nullum hominem currere est verum’, the formal composition is
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between ‘nullum hominem currere’ (the subject) and ‘verum’ (the predicate); the material
composition is between ‘hominem’ and ‘currere’ within the main proposition’s subject.
Burley’s point in this paragraph, therefore, is that when a universal quantifier negates amaterial composition only (as in the “composite” reading of the example-sentence), it
does not confuse the other extreme, since the whole proposition is not made negative bythat quantifier. But when it negates the formal composition, it does confuse the otherextreme, since then it does make the whole proposition negative.
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