In an era when it appears that no horse can run twice under the same moon, once again we're going to have plenty of relatively unexposed animals converging on the GI Kentucky Derby. That requires us to fall back on some secondary evidence, in pedigree and upbringing, to estimate what latent resources may be summoned to deal with the startling novelty of a 20-horse stampede. That's why the handicapping jury should heed the defense attorney for Litigate (Blame), despite a pedestrian 77 Beyer in the GIII Sam F. Davis S....