Combining Texts

Ideas for 'Walking the Tightrope of Reason', 'The Fixation of Belief' and 'Morality as system of hypothetical imperatives'

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13. Knowledge Criteria / A. Justification Problems / 1. Justification / c. Defeasibility

6589	Knowledge is legitimate only if all relevant defeaters have been eliminated [Fogelin]
	Full Idea: In general a knowledge claim is legitimate only if all relevant defeaters have been eliminated.
	From: Robert Fogelin (Walking the Tightrope of Reason [2003], Ch.4)
	A reaction: The problem here is what is 'relevant'. Fogelin's example is 'Are you sure the suspect doesn't have a twin brother?' If virtual reality is relevant, most knowledge is defeated. Certainly, imaginative people feel that they know less than others.