Warren Buffett might be the greatest investor of all time, but he’s not immune from making mistakes. This was on full display at the recent Berkshire Hathaway (NYSE:BRK-A, NYSE:BRK-B) annual meeting, where Buffett disclosed that he had sold the company’s entire stake in Paramount Global (NASDAQ:PARA) at a substantial loss.Although the exact loss wasn’t disclosed, Buffett said: “I was 100% responsible for the Paramount decision. It was 100% my decision, and we’ve sold it all and we lost quite a bit of money. ...