This is for the old Americans like me. Apologies to the rest of you, who may not get it.

Scene: Match Game '78 (A Mark Goodman-Bill Todman production)

Gene Rayburn: Dumb Donald is so dumb…

Audience: HOW DUMB IS HE?

Gene Rayburn: He's so dumb that every time he turns the lights off, he says, "I can't find my blank."

cue funky 70s game show music

WWDC 2019: what to expect [theverge.com]

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