Suppose Serena Williams (born September 26, 1981) is an American professional tennis player. She has been ranked world No. 1 by the Women's Tennis Association (WTA) on multiple occasions, including 319 weeks in singles and 185 weeks in doubles, making her the oldest player to have reached the top of the women's rankings.
Can we infer that "Serena Williams has never been ranked as world No. 1 by the WTA."? Yes, no, or maybe?