ABSTRACT
Let me return to evidence-or-acquaintance arguments. They were defined in chapter I. An evidence-or-acquaintance argument is a sceptical argument for ignorance which does not rely on any optional condition for knowledge other than either
(A) S knows a contingent proposition p only if either (i) he believes a proposition which is evidence for p, or (ii) p is entailed by a true proposition of the form ‘S is acquainted with x’,
or the rather stronger (B) S knows a contingent proposition p only if either (i) he believes a
proposition which is evidence for p, and no proposition is stronger evidence for not-p, or (ii) p is entailed by a true proposition of the form ‘S is acquainted with x’.
