If the fact one is acquainted with differs from the fact that makes P true, then P could be false while the belief is still justified.

When acquaintance with the fact that P is part of what constitutes my foundational justification for believing P, there is a trivial sense in which my foundational justification is infallible. I can’t be directly acquainted with the fact that P while I believe P falsely. However, most contemporary foundationalists are fallibilists about foundational justification: they hold that one could be foundationally justified in believing propositions that are false. It seems plausible that I could be jus