Over the weekend, female fencer Stephanie Turner didn’t just forfeit a match; she lit a match under the powder keg of women’s sports. The day before the Cherry Blossom Open fencing competition in Maryland, Turner had decided she would not play against Redmond Sullivan, a transgender-identifying man. But rather than quietly bowing out early, she bided her time, choosing when to act. That moment came on the mat, for all to see, in a deliberate and defiant stand. “I saw that I was going to be in a pool with Redmond, and from there I said, ‘OK, let’s do it....