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Peter McParland, Aston Villa’s 1957 FA Cup final hero, dies aged 91
Atalanta fan stabbed to death in clashes with Inter supporters, police confirm
France and EU to incentivise US-based scientists to come to Europe
China ‘evaluating’ US offer to engage in trade negotiations
World may be ‘post-herd immunity’ to measles, top US scientist says
A head-scratching hat puzzle
Today’s puzzle retrospectively commemorates UNESCO’s World Logic Day, which took place last week. (The date, January 14, is both the day Kurt Gödel died and the day Alfred Tarski was born, a calendrical coincidence that links the pre-eminent logicians of the twentieth century.)
It is a logic puzzle and, as is typical for the genre, concerns a group of clever people wearing colourful headwear.
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