Premise

A premise is a statement which an argument claims will justify a conclusion."Argument: a sequence of statements such that some of them (the premises) purport to give reasons to accept another of them, the conclusion" : The Cambridge Dictionary of Philosophy. 2nd ed, Cambridge University Press. p43 The proof of a conclusion depends on both the truth of the premises and the validity of the argument.

 Aristotelian logic 
Aristotle held that any logical argument could be reduced to three premises and a conclusion.Gullberg, Jan Mathematics from the birth of numbers. Norton, New York. 216   Premises are sometimes left unstated in which case they are called missing premises, for example:

Socrates is mortal, since all men are mortal.

It is understood that Socrates is a man.  The fully expressed reasoning is thus:

Since all men are mortal and Socrates is a man, Socrates is mortal.

In this example, the first two independent clauses before the comma (namely, "all men are mortal" and "Socrates is a man") are the premises, while "Socrates is mortal" is the conclusion.

 Mathematical logic 
In logic, an argument requires a set of two declarative sentences (or "propositions") known as the premises, with another declarative sentence (or "proposition") known as the conclusion. This structure of two premises and one conclusion forms the basic argumentative structure.

More complex arguments can use a series of rules to connect several premises to one conclusion, or to derive a number of conclusions from the original premises. An example of this is the use of the rules of inference found within symbolic logic.

Related pages
 Apples and oranges
 False dilemma
 Falsifiability

 References 

Category:Logic