“I think ‘moats’ are lame,” Mr. Musk had said during a Tesla earnings call. It was a criticism of an economic principle that Mr. Buffett had coined in 1999 and that has become something of a mantra for his faithful: Invest in businesses “that have wide, sustainable moats around them.”

The cedars of shingles and the familiar wooden houses is yet another non-cedrous species, Thuya plicala — much nearer to a cypress than a cedar and quite different from the Thuya of antique veneers.

So-called postsale revenue, which includes the sale of ink and other supplies to companies that already own or lease Xerox machines, fell 14 percent, to $2.78 billion.

Hitting reply all on a mass email is generally a bad idea, but a meltdown at the UK’s National Health Service (NHS) is the worst reply allpocalypse we’ve ever seen. According to The Guardian, more than 186 million useless emails were sent out, after a technician sent a test message to all 1.2 million employees of the NHS.