Proving What We Already "Know"

[Jehanne]

Other than one's existence, unless a proposed truth is falsifiable, it is a subjective proposition, of which there are an infinite number.

IMHO the principle of noncontradiction counts as a non-subjective truth precisely because it cannot be falsified. But your point is well taken with respect to empirical truthes.

In my opinion, thr principle of noncontradiction is falsifiable, in that it is true unless we live in some virtual reality, some holodeck, in which case, all bets are off.