premise: The 2001 NFL draft was the 66th annual meeting of National Football League (NFL) franchises to select newly eligible football players. The draft, which is officially referred to as the "NFL Player Selection Meeting," was held at the Theater at Madison Square Garden in New York City, New York on April 21–22, 2001.
hypothesis: The NFL draft is held once per year.
reason: The draft is an "annual" draft, meaning it's held once per year, so this statement is correct.  The system may have confused the dates of April 21 and 22 as meaning it's held more often than that, even though it was a single event held over two days.