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The Guardian - UK
The Guardian - UK
Science
Alex Bellos

Can you solve it? That Sally Rooney hat puzzle

Green velvet peaked cap by Accessorize Hat
Green velvet peaked cap by Accessorize Photograph: Graham Turner/The Guardian

Midway though the new Sally Rooney novel, Intermezzo, two of the characters discuss a puzzle about hats. I thought it would make a perfect puzzle for this column, so here it is.

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

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