Back in the days when I trained teenagers to cut bagels for living, we had an expression about knives: Dull is dangerous, sharp is safe. Basically, what that means is that a knife that isn't properly sharpened has a tendency to snag or to cut a person's hand in a way that's much worse than a sharp blade. I really enjoyed reading Isaac Butler's piece about the supposedly safe course pursued by some venues in programming familiar material in their...

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