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Descartes' immortal conclusion cogito ergo sum was recently subjected to destruction testing by a group of graduate researchers at Princeton led by Professors Montjuic and Lauterbrunnen, and now reads, in the Shorter Harvard Orthodoxy: (a) I think, therefore I am; or (b) Perhaps I thought, therefore I was; but (c) These days, I tend to leave that side of things to my wife.

Tom Holt (2009). “Ye Gods!”, p.169, Hachette UK
Descartes' immortal conclusion cogito ergo sum was recently subjected to destruction testing by a group of graduate researchers at Princeton led by Professors Montjuic and Lauterbrunnen, and now reads, in the Shorter