Suppose Serena Williams is an American professional tennis player and former world No. 1 in women's singles. She has won 23 Grand Slam singles titles, the most by any player in the Open Era, and has been ranked world No. 1 in singles on eight separate occasions between 2002 and 2017. She is considered one of the greatest tennis players of all time.
Can we infer that "Serena Williams has never won a Grand Slam singles title"? Yes, no, or maybe?