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The Guardian - UK

Science

Alex Bellos

Did you solve it? That Sally Rooney hat puzzle

Hay Festival - Day 4HAY ON WYE, UNITED KINGDOM - MAY 28: Sally Rooney, novelist, at the Hay Festival on May 28, 2017 in Hay on Wye, United Kingdom. (Photo by David Levenson/Getty Images) — Sally Rooney, novelist, at the Hay Festival on May 28, 2017 Photograph: David Levenson/Getty Images

Earlier today I set you the following puzzle, which I read in the new Sally Rooney novel, Intermezzo. Here it is again with the solution.

A liar who always lies says “All my hats are green.”

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