Commentary A couple of weeks before the completion of the catastrophe of the American presence in Afghanistan—or, if you believe President Joe Biden, the “extraordinary success” of the American evacuation—a Russo-British comedian named Konstantin Kisin published a brilliantly funny thread on Twitter headed: You’re struggling to understand why some people are vaccine hesitant. Let me help you.” The “let me help you” megathread, as he called it, consisted of example after example of so-called “expert” opinions that have turned out to be completely wrong—beginning with the British vote for Brexit and the American vote for President Donald Trump in 2016, both of which elections the top experts at the time confidently assured us would go the other way. Actually, Kisin’s spiel could be considered as a belated gloss on one of the most famous quotations to come out of the Brexit referendum, that of the Brexiteer and veteran government minister Michael …