Cogito, ergo sum
我思う、ゆえに我あり
Cartesian doubt
Floating man
List of Latin phrases
Solipsism
Academic skepticism
Brain in a vat
I Am that I Am
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Cogito, ergo sum
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Cogito, ergo sum
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Cogito, ergo sum
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Cogito, ergo sum
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Cogito, ergo sum