How the establishment fell for eugenics — UnHerd

It isn’t the most lavish of memorials: a small stained glass window featuring a 7×7 grid of seven different colours. But on closer inspection you see that each colour appears once — and once only — in each row and column. This glorified Sudoku puzzle is called a ‘Latin square’, and is one of those things…

via How the establishment fell for eugenics — UnHerd

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