OpinionJournal’s Best of the Web repeats an old math gag:
Let a=1
Let b=1
Therefore a=b
Multiplying both sides by a gives a^2=ab
Subtract 1 from the left and b (which equals 1) from the right: a^2-1=ab-b
If you remember your quadratic equations, this factors to: (a+1)(a-1)=b(a-1)
Dividing both sides by a-1, we have a+1=b, or 1+1=1
Therefore 2=1
Persuades me!
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