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A TEST OF TRUTH / 4 MINUTES

Three boxes, one true label

A brass token is sealed inside exactly one of three boxes: silver, brass, or oak. Exactly one label is true. The other two are false. All labels refer to the token's current location.

The evidence

  1. Silver box: ‘The token is not in the oak box.’
  2. Brass box: ‘The token is in this brass box.’
  3. Oak box: ‘The token is not in the brass box.’

Which box contains the token?

Silver · Brass · Oak

A little hint

Try each location, then count how many labels would be true.

Reveal the reasoning

Oak

The token is in oak. If it were in silver, the silver and oak labels would both be true. If it were in brass, the silver and brass labels would both be true. Only oak gives exactly one true label: the oak label.

All the information you need is in the clues. A useful way to solve this case is to test each possible answer against every fact, instead of choosing the first answer that feels plausible.

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