On the hardwood, and not the racetrack, we learned this week that there is no such thing as an irrefutable truth in sports. It was supposed to be a certainty that a No. 16 seed cannot beat a No. 1 seed in the NCAA tournament. They were, entering this year’s tournament, 0-135. Let’s make that 1 for 135. A school you never heard of, No. 16 UMBC (University Maryland, Baltimore County) not only beat No. 1 seed Virginia Friday, they walloped them, 74-54.