Suppose Serena Williams (born September 26, 1981) is an American professional tennis player. She has won 23 Grand Slam singles titles, the most by any player in the Open Era, and the second most of all time. Serena has also won 14 Grand Slam doubles titles with her sister Venus Williams. In 2015, she appeared in the movie "Pixels" alongside Adam Sandler.
Can we infer that "Serena Williams has never won a Grand Slam singles title."? Yes, no, or maybe?