My further contention is that knowledge is essential to the possession of some abilities, capacities, faculties and powers and to the conscious exercise of any ability, capacity, faculty or power. The question as to what abilities, capacities, faculties or powers are possessed or exercised by anyone, and the question as to what resources are employed in the exercise of abilities, capacities, faculties or powers, are questions of fact. That is to say that the apprehension of the truth of any statement which explicitly or implicitly makes reference to the possession or exercise of any ability, capacity, faculty, or power on the part of any specific individual requires that something other than the statement be evident to whomsoever apprehends that truth. This is, in general, essential to there being such a thing as factual discourse and an aspect, perhaps essential, of any discourse, where something beyond the body of convention that is language governs the distinction between appropriate or inappropriate usage. Discourse is about something and that something in some way plays a part in the conduct and behaviour of those engaged in the discourse.
Relevance is internal to the discourse.
An articulate view of discourse will be governed by questions of relevance other than those that govern the principle discourse and there will be facts that are relevant to the broader view that are not relevant to the principle discourse. The fact that I expend effort, noticeable to me, in choosing the words that comprise this essay might be an example of that, but the specific facts of that matter are not relevant to what I have to say by means of the words I choose. In this essay I employ words, which may be all that is evident here. The reader may or may not regard this article as a manifestation of such abilities, capacities, faculties and powers as are employed in writing it, nor need the abilities, capacities, faculties and powers that reading it employs be evident to the reader. The point is that what I have written is evident to whomsoever reads it.