Except for perhaps Hillary Clinton, Roger Clemens is the newsmaker of the week. Since the pitcher better known as the best right-hander ever to throw from the mound boiled to an irate indignation on 60 Minutes Sunday night, the flap has ratcheted up to a roar. A Congressional hearing is slated in about a month, which will prompt depositions and perhaps even eventual proof positive that Clemens did in fact use steroids. Proving his contention, that he never used, is a trickier proposition...