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05-19-2010, 10:12 PM
A pretty old one but quite a good if you consider this uses only basic algebra.
a=b
a² = ab
a²+ a² = a² + ab
2a² =a² + ab
2a² - 2ab = a² + ab - 2ab
can also be written as:
2(a² - ab) = 1(a² - ab)
cancelling (a² - ab):
2 = 1
Quis custodiet custodes?
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