|Criteria: do not follow from a definition but must be developed. The criteria for the application of a concept to an object are more concerned with language practice in a community. E.g. the definition of truth does not provide a criterion for which sentences are true.|
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Criteria/Cavell: the skeptic is right with the assumption that to the knowledge that someone has pain belongs more than just the presence of criteria.
Criteria can determine whether a behavior expresses more pain than pleasure, but not whether it is a genuine pain instead of a pretended one.
Wittgenstein/Cavell: both deny, contrary to most other philosophers, that conformity with criteria (a sign of intelligible speech) can be justified by reference to universals.
Die Unheimlichkeit des Gewöhnlichen Frankfurt 2002