Watson, an obstruction in the pipe requires decisive pressure, not gentle rinsing. Clear the blockage immediately.
Watson, when the suspect is handcuffed, further struggle is useless. Conserve your energy for the trial.
Watson, plunge the scalpel deep to excise the rot. A superficial cut only prolongs the infection.
Watson, stale poison in an old vial still kills. Test the ground before you take another step.
Watson, this lock requires a heavy crowbar, not a delicate pick. Apply maximum force to break it.
Watson, the truth lies beneath a layer of soot. Scrub hard; the gold coin is worth the effort.
Watson, he who plugs his ears to the foghorn will inevitably run his vessel aground.