A modern take on the classic Lewis Carrol style logic puzzle

Lewis Carroll was a noted logician and wrote intricate logic puzzles that combined his sense of the absurd with his interest in logic. At io9’s  regular puzzle spot they have a modern (1960s) version by Hubert Phillips.

  1. Pickled walnuts are always provided at Professor Piltdown’s parties.
  2. No animal that does not prefer Beethoven to Mozart ever takes a taxi in Bond Street
  3. All armadillos can speak the Basque dialect.
  4. No animal can be registered as a philatelist who does not carry a collapsible umbrella.
  5. Any animal that can speak Basque is eligible for the Tintinnabulum Club.
  6. Only animals that are registered philatelists are invited to Professor Piltdown’s parties.
  7. All animals eligible for the Tintinnabulum Club prefer Mozart to Beethoven.
  8. The only animals that enjoy pickled walnuts are those who get them at Professor Piltdown’s.
  9. Only animals that take taxis in Bond Street carry collapsible umbrellas.

The idea is to pick your way through the chains of logic to see what kinds of conclusions can be drawn. Re-ordering them into related chains can help piece together some of the connections. Dealing with the sentences on a purely abstract basis is one way to go but letting the bizarre imagery pile up on you is more fun.

No animal can be registered as a philatelist who does not carry a collapsible umbrella. Only animals that take taxis in Bond Street carry collapsible umbrellas. No animal that does not prefer Beethoven to Mozart ever takes a taxi in Bond Street.

Can we infer that animals registered as philatelists prefer Beethoven to Mozart?

http://io9.com/this-puzzle-is-completely-absurd-but-you-can-still-sol-1722971133

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One thought on “A modern take on the classic Lewis Carrol style logic puzzle

  1. There’s a nice sequence in Robert Heinlein’s The Number of the Beast where they meet Lewis Carroll (or, rather, they meet Charles Dodgson) and engage in a little bit of surreal symbolic logic wordplay along similar lines (using non-sequiturs to lead to a logical conclusion.)

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