 Williamson identifies one’s evidence with what one knows. However, one might adopt other conceptions of evidence, and one might even take evidential probabilities to link any two propositions whatsoever. Williamson maintains that evidential probabilities are not logical—in particular, they are not syntactically definable. He assumes an initial probability distribution \(P\), which “measures something like the intrinsic plausibility of hypotheses prior to investigation” (211). The evidential probability of \(h\) on total evidence \(e\) is then given by \(P(h\mid e)\).