Descartes had his famous cogito ergo sum; but Thomas had added to it with his “Since I doubt, I think; since I think, I exist.” Well, I was certainly… - Dennis E. Taylor

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Descartes had his famous cogito ergo sum; but Thomas had added to it with his “Since I doubt, I think; since I think, I exist.” Well, I was certainly full of doubt. Doubt implied self-awareness, and a concern for one’s future. So I was a conscious entity, barring evidence to the contrary. One down.