If x = 1 Then x = 0

Here is a "proof" that if x = 1 then x = 0 as well:
  • x = 1
  • x2 = x
  • x2 - 1 = x - 1
  • (x + 1)(x - 1) = (x - 1)
  • x + 1 = 1
  • x = 0
  • QED

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