Singularity is almost invariably a clue.
The more featureless and commonplace a crime is, the more difficult is it to bring it home.
The only kind of seafood I trust is the fish stick, a totally featureless fish that doesn't have eyeballs or fins.
As a rule, said Holmes, the more bizarre a thing is the less mysterious it proves to be. It is your commonplace, featureless crimes which are really puzzling, just as a commonplace face is the most difficult to identify.
Last Update: February, 2020