SAN JOSE — Trey Kaufman-Renn is a smart guy. A thinker. A philosophy major who sometimes annoys his teammates with existential questions that have no easy answers. If Shaq is the Big Aristotle, Kaufman-Renn might be the Big Sartre.He likes to process information, absorb it, then act upon it. In the split-second game of basketball, that can occasionally be a drawback.“I always compare it to watching TV and listening to the radio,” says Kaufman-Renn’s coach at Purdue, Matt Painter. “He’s like a second behind.”Except for the very end of a riveting NCAA men’s tournament Sweet 16 game Thursday night. With everything on the line—including Kaufman-Renn’s college career—he was a second ahead. That reaction was the difference between winning and losing.Eighteen sneakered feet were on the hardwood as Purdue point guard Braden Smith’s driving banker bounced off the rim. Two were in the air. They belonged to Kaufman-Renn, as he jumped over Texas’s Dailyn Swain.…