You’ve seen the puzzles. Two pictures that look almost identical. But if you look really closely the dog has ear spots in one but not the other, there are three fireflies not two, and one of the eyes in one of the paintings is closed. Do a print ad based on the same idea. Side A shows a happy Ford user. Side B shows a frowning Subaru motorist. Hmm. Dent’s bigger. Ford driver doesn’t have a scratch, but Subaru guy has multiple head wounds and deployed air bags. OK, I’m going overboard. Idea’s primarily meant to hold attention, though comparisons, even funny ones, are always smart.