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• Contrariwise," continued Tweedledee, "if it was so, it might be, and if it were so, it would be
  but as it isn't, it ain't. That's logic!...
• Contrariwise," continued Tweedledee, "if it was so, it might be, and if it were so, it would be
  but as it isn't, it ain't. That's logic!" -- Lewis Carroll...
• Contrariwise", continued Tweedledee, "If it was so, it might be
  and if it were so, it would be; but as it isn't, it ain't....
• Contrariwise," continued Tweedledee, "if it was so, it might be, and if it were so, it would be
  but as it isn't, it ain't. That's logic!...
• Tweedledum and Tweedledee agreed to have a battle... -- Lewis Carroll
• Tweedledum and Tweedledee Agreed to have a battle; For Tweedledum said Tweedledee Had spoilt his nice new rattle.
  Just then flew down a monstrous crow, As black as a tar-barrel...
• You see, a minute goes by so fearfully quick. You might as well try to stop a Bandersnatch!
  -- Lewis Carroll, "Through the Looking-Gla...
• Then Logic would take you by the throat, and force you to do it.
  -- Achilles in Lewis Carroll's "What the Tortoise Said to Achille...