Suppose Serena Williams (born September 26, 1981) is a professional tennis player and former world No. 1. She has won 23 Grand Slam singles titles, the most by any player in the Open Era, and has been ranked No. 1 in singles on eight separate occasions. Williams is considered one of the greatest tennis players of all time.
Can we infer that "Serena Williams has never won a Grand Slam title"? Yes, no, or maybe?