In Arthur Conan Doyle’s short story, Silver Blaze, Sherlock Holmes makes perhaps his most famous deduction. After a champion racehorse is stolen and its trainer murdered, Holmes notes that the watchdog didn’t bark during the night — and that, said Holmes, was proof “the midnight visitor was someone whom the dog knew well.”
Since then, “the dog that didn’t bark” has become a useful way of talking about things that should have happened but didn’t.
Such as this week, when Donald Trump didn’t hit a golf ball.
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