User blog comment:Thailog/Ep. 123 "Insecurity" discussion/@comment-2160860-20120402031502/@comment-3465526-20120402033518

Non, non, mon ami -- eet is not guessing, but ze work of ze leetle gray cells that show you ze solution (sorry, the wife and I are watching the entire Poirot series at the moment).

Of course this only works if the writers are playing fair (the solution must be resolvable from the clues given)