<logic, epistemology> a sentence, proposition, thought, or judgement is a posteriori (literally "after") if its truth is dependent on how our actual experience (experiment and observation) turns out. Many have thought that the truths of the empirical, or nonmathematical, sciences are entirely a posteriori, though the rationalists and some recent philosophers such as S. Kripke & N. Chomsky seem to deny this. Some take synthetic and a posteriori to be equivalence. Compare a priori
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