Over the weekend, the judge presiding over Bill Cosby’s sexual assault trial declared a mistrial after the jury was unable to reach a unanimous verdict. I hadn’t followed the case very closely and my knee-jerk reaction was, “wait, fifty women have accused this guy of sexual assault and he didn’t get convicted?” As I thought more about it, I began to wonder how many accusers — other than Andrea Constand, the alleged victim in the case — were allowed to testify against Cosby. It turns out that it was only one.