Last year, top executives considered a broad policy that would ban “dehumanizing” language. But defining that proved so complex — and the public response so critical — that they narrowed their focus to banning insulting speech that is directed at religious groups.

Related: A federal court in the U.S. ruled that President Trump has violated the Constitution by blocking people on Twitter because they criticized or mocked him, a decision that could have wider implications for how freedom of speech enshrined in the First Amendment applies to the social media era.

Pound plummets amid Brexit worries

The British pound tumbled against the dollar on Tuesday to its lowest level in two years, as investors face the growing likelihood of a no-deal Brexit.

Boris Johnson, Britain’s former foreign secretary and widely considered to be the leading candidate for prime minister, has pushed for an abrupt withdrawal from the E.U. on Oct. 31 — a prospect that business leaders have warned would imperil the economy.

Global economy: There are signs around the world that another global downturn is imminent: The chances that the U.S. enters a recession next year have grown, unemployment in Germany has ticked up and factory production in Japan has been weak.