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Wasn't there a second version of AlphaGo that was trained only by playing against itself without external input and turned out to be even better than the first

Wasn't there a second version of AlphaGo that was trained only by playing against itself without external input and turned out to be even better than the first version that was trained with external input? Isn't that unsupervised learning?

skj 7y ago
You have ground truth on the result: one agent won the game. With voice recognition, that's a lot more vague and human supervision is helpful.
dekhn 7y ago
the rules of the game, and the output from winning, is supervision.