Related:

• THEORETICIANS do it conceptually
• Hackers do it without proof of termination.
• An example is not proof.
• You must realize that the computer has it in for you.
  The irrefutable proof of this is that the computer always does what you tell it to do....
• You must realize that the computer has it in for you.
  The irrefutable proof of this is that the computer always does what you tell it to do....
• Lack of proof <> proof of lack.
• Faced with the choice between changing one's mind and proving that there is no need to do so, almost everyone gets busy on the proof.
  -- Galbraith's Law...