David Tepper didn't amass a net worth of $21.3 billion by thinking conventionally. He's viewed by some as the greatest hedge fund manager of this generation as a result of his out-of-the-box moves. If you look at the top holdings in Tepper's Appaloosa Management portfolio, you'll probably quickly see that the billionaire seems to like artificial intelligence (AI) stocks. But he appears to be betting on AI in a different way than most these days.AI stocks Tepper is selling and buyingAmazon (AMZN -8.89%) has ...