Suppose Serena Williams is a professional tennis player and former world No. 1 in women's singles tennis. She has won 23 Grand Slam singles titles, the most by any player in the Open Era, and 14 Grand Slam doubles titles. She is married to Alexis Ohanian, co-founder of Reddit.
Can we infer that "Serena Williams has never won a Grand Slam singles title."? Yes, no, or maybe?