WarGames Ending: “The Only Winning Move Is Not to Play”

HN cites it as shorthand for the tic-tac-toe lesson, especially in threads about AI and nuclear strategy or games that cannot be won.

The final scene of the 1983 film WarGames, in which the WOPR computer runs through nuclear war scenarios and concludes that the only winning move is not to play. It is a six-minute clip uploaded in higher quality than earlier copies.