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Ideas for 'Isagoge ('Introduction')', 'Quodlibeta' and 'Against the Mathematicians'

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13. Knowledge Criteria / B. Internal Justification / 4. Foundationalism / b. Basic beliefs

20795	Some things are their own criterion, such as straightness, a set of scales, or light [Sext.Empiricus]
	Full Idea: Dogmatists say something can be its own criterion. The straight is the standard of itself, and a set of scales establishes the equality of other things and of itself, and light seems to reveal not just other things but also itself.
	From: Sextus Empiricus (Against the Mathematicians [c.180], 442)
	A reaction: Each of these may be a bit dubious, but deserves careful discussion.