Wittgenstein and criteria

An essay to develop some of Wittgenstein's remarks about the notion of ‘criteria’ and to give the concept clarity even at the expense of some features Wittgenstein claimed for it. This effort was made because of the important role ‘criteria’ plays in Wittgenstein's discussions of feelings and mental states, and it is hoped that a defense of ‘criteria’ will make those discussions more coherent. An attempt is made to relate this notion of ‘criteria’ to the definition and expression of mental states, following some of Wittgenstein's suggestions, and to rebut skepticism about other minds.