By all rights, Jack Montague should be in Providence, RI, on Thursday, leading Yale against Baylor in its first NCAA tournament appearance since 1962.

Instead, he’ll be watching the game on TV — and pondering his lawsuit after Yale expelled him just three months before graduation. Yale says he had non-consensual sex with a fellow student. He plans to sue — and he has a compelling case.

An independent investigator hired by Yale found the two students had an ongoing consensual sexual relationship in the fall of 2014.

On their last time together, they had sex, then split up. But more than a year later, she told a school Title IX coordinator the last encounter wasn’t consensual.

Montague disputes that. After all, later that evening, she returned to his room and spent the night with him. She never called the police or filed a complaint.

But the Yale official brought charges. The school brought in its investigator, who decided to simply believe the accuser. That’s how Yale opted to expel its basketball captain in the second semester of his senior year.

As Montague’s lawyer notes: “It defies logic and common sense that a woman would seek to reconnect and get into bed with a man who she says forced her to have unwanted sex just hours earlier.”

Notably, the expulsion comes in the wake of a deal with the feds after the Department of Education found that Yale had “largely underreported” sexual-harassment allegations.

It isn’t dismissing genuine sexual assault to say that hysteria over the supposed campus rape epidemic has thrown due process to the wind.

Which leaves Jack Montague jumping through legal hoops instead of shooting real ones.