“Before beginning this treatise, he wanted the advice of The Baboon, his philosophy prof. “Excuse me, sir,” he said at the end of a class, “could anyone claim that we don’t exist?” The Baboon said no. “Goghito,” he said, “ergo zum. You exist because you doubt your existence.”

“Before beginning this treatise, he wanted the advice of The Baboon, his philosophy prof. “Excuse me, sir,” he said at the end of a class, “could anyone claim that we don’t exist?” The Baboon said no. “Goghito,” he said, “ergo zum. You exist because you doubt your existence.”

— Jean-Paul Sartre