What is represented by a
what is real; what is the case; what is so.
Every human being that
learned to speak learned this on the basis of a notion like fact.
is not with the intuitive notion but with ascertaining whether or not
statements represent facts, and what manner of facts, and how to ascertain
this is so or not.
And indeed: Often one should know that the fact of a
certain matter is that one does not have sufficient
evidence to confidently assert what the facts
are - and such knowledge that one has no knowledge about something, or
not enough knowledge to pronounce confidently, is often the firmest
knowledge one has.