Warren Buffett doesn't invest in what he doesn't understand, and he has readily admitted that he doesn't understand artificial intelligence (AI). So does that mean the legendary investor doesn't have any AI stocks in his portfolio? Nope.

Granted, Berkshire Hathaway (NYSE: BRK.A) (NYSE: BRK.B) only owns a few AI stocks. However, Berkshire's subsidiary, New England Asset Management (NEAM), features quite a few stocks with solid AI connections among its holdings. 

Even though Buffett didn't personally pick all of these stocks, he nonetheless owns them. Here are all of his AI stocks, ranked from best to worst (in my calculated opinion). 

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Source Fool.com