Because they are creatures of habits and habitual studiers, UNC’s Roy Williams and Kentucky’s John Calipari will rewind the tape to Dec. 4th. They will watch intensely at film from the previous time their two teams played. They will look for tendencies and search for weaknesses to try to find any little edge that might give them an advantage. But that tape might as well be a college basketball Zapruder film — filled with unsatisfactory and inconclusive evidence. Save one.