Who wrote, "I am, I exist, is necessarily TRUE each time that I pronounce it, or that I mentally conceive it."
A) Rene Descartes.
B) David Hume.
C) Gottfried Leibniz.
D) Baruch Spinoza.

Question

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Rene Descartes is the philosopher who made this statement as part of his foundational work in philosophy, particularly in his exploration of the certainty of one's own existence. This statement is a central element of his method of doubt and is often summarized by the famous phrase "Cogito, ergo sum" ("I think, therefore I am").

Who Wrote, "I Am, I Exist, Is Necessarily TRUE Each