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So does Noam Chomsky on the far left, propounding a few historical distortions along the way.

"And no matter what you may think, Mr. Kennedy. And I revere your name. You're not here to propound your case for censorship," Connolly said.

While he propounded a number of groundbreaking if sometimes controversial theories, Professor Lucas was best known for his hypothesis of “rational expectations,” advanced in the early 1970s in a critique of macroeconomics.

And it ends with one of them stepping on a butterfly and changing the course of history — 20 years before the chaos theoretician Edward Norton Lorenz propounded the “butterfly effect.”

Global Britain, as propounded by Mr. Johnson, was meant to evoke a Britain, unshackled from Brussels, that could be agile and opportunistic, a lightly regulated, free-trading powerhouse.