All Numbers Are Equal

A funny proof showing that all number are equal, and math is useless.

Theorem   All numbers are equal.

Proof   Choose arbitrary a and b, and let t = a + b. Then

a + b              = t
(a + b)(a - b)     = t(a - b)
a^2 - b^2          = ta - tb
a^2 - ta           = b^2 - tb
a^2 - ta + (t^2)/4 = b^2 - tb + (t^2)/4
(a - t/2)^2        = (b - t/2)^2
a - t/2            = b - t/2
a                  = b

Last modified: 2008-01-13 (edit)
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