ABSTRACT
This chapter examines additional facets of the theory of criteria. The criteria relation is purely grammatical in character. Wittgenstein’s treatment of epistemology prior to On Certainty was in the middle period. It concerned the rise and wane of verificationist ideas. According to the preferred interpretation, criteria are not necessarily, good evidence. They also have no role as necessarily, good evidence. A significant topic found in the secondary literature, no doubt fuelled by the controversy between realists and anti-realists, is the interpretation of criteria within a constructivist framework. The preferred theory of criteria arguably demonstrates the incorrectness of the anti-realist setting in a variety of ways. The applicability of criteria for pain seems to be an in built epistemological property of the criteria for pain because of the apparent conformity of the rules of grammar for pain to the physical and psychological characteristics of pain.
