This propositional form of knowledge is called a priori. That is, to know a thing one must be certain that it meets those three conditions, dubbed standard analysis. If we accept this analysis, the focus then shifts to the clarification of these conditions. Let us examine them in the reverse order, just for a sense of excitement. Knowledge requires that one believes that which one reports to know.
Beliefs have objects, that is beliefs are generally about something.
Often beliefs are intended to describe or represent some state of affairs. This leads us into meaning. Verificationism is the theory that meaning consists in its methods of verification. This is a messy view and requires some examination in light of objections. The truth condition consists of a variety of notions about its nature.