In Alvin Goldman's article "What Is Justified Belief", what does "p is true for S at t" mean? where p is a proposition, S is a person and t is time.
More specifically, how is it different from "p is true"
The full proposal in the article is
proposition p is self-presenting if and only if: necessarily, for any S and any t, if p is true for S at t, then S believes p at t
Full article here (page 92)