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Ideas for 'fragments/reports', 'City of God' and 'Essay on a Problem in the Doctrine of Chances'

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11. Knowledge Aims / B. Certain Knowledge / 4. The Cogito

3912	I must exist in order to be mistaken, so that even if I am mistaken, I can't be wrong about my own existence [Augustine]
	Full Idea: Since therefore I must exist in order to be mistaken, then even if I am mistaken, there can be no doubt that I am not mistaken in my knowledge that I exist…. I know that I exist, and I also know that I know.
	From: Augustine (City of God [c.427], Ch.XI.26)
	A reaction: Fine, but the main problem is his over-confidence about a stable personal identity that does the thinking.