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‘A Spurs legend forever’: players hail Ange Postecoglou in wake of sacking
Millions of Australian workers to get an above-inflation pay rise as minimum wage lifts by 3.5%
High-rise, high expectations: is Casablanca’s finance hub a model for African development?
EU agrees to increase flight delay times before passengers get compensation
Amazon ‘testing humanoid robots to deliver packages’
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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