Bertrand Russel used humour to show that whatever is logical is not necessary true. He was saying the following Do you pretend that if 2+2=5, then Bertrand Russel is the pope ? Suppose that 2+2=5 Let's substract 2 from each side, then 2=3 By symmetry we have 3=2 If you substract 1 on both sides, 2=1 Now the pope and I are two distinct people, since 2=1 the Pope and Russel are one.
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