I have just argued that knowledge by definition implies the possibility of giving grounds for knowledge claims. Where a claim to knowledge has no grounds, or perhaps only poor support, we must say that this is not a case of knowledge, only a matter of weak or wise belief. It has been assumed that following a knowledge claim it is always possible to ask ‘How do you know?’ in expectation of an answer. H. H. Price has asked whether this assumption is warranted in all cases.1
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