Combining Texts

Ideas for 'Isagoge ('Introduction')', 'Abstract Objects' and 'Posterior Analytics'

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11. Knowledge Aims / B. Certain Knowledge / 1. Certainty

1673	Knowledge proceeds from principles, so it is hard to know if we know [Aristotle]
	Full Idea: It is difficult to know whether you know something or not. For it is difficult to know whether or not our knowledge of something proceeds from its principles - and this is what it is to know something.
	From: Aristotle (Posterior Analytics [c.327 BCE], 76a25)