Politicians never lie. Well, hardly ever. They’re not into full disclosure, as a rule, but they know that if you lie, sooner or later you will be caught out, and then you are in deep trouble. So just change the subject, or answer a different question than the one you were asked, or just keep talking but saying nothing until everybody gets bored and moves on. British prime minister Theresa May had a bad day with the truth recently. She got her job when last year’s referendum came out narrowly in favour of leaving the European Union—Brexit—and the previous prime minister, David Cameron, had to resign.