Don't argue with the Chief

I was on the steamship I work on one day (we were dockside, and the Chief and I were about to do some work on the boiler). The ship was open to the public for tours as it usually is on Saturdays.The Chief has been running marine steam plants professionally for over forty years.This visitor comes up to the Chief, and, as is not uncommon, proceeds to mistake the cylinder block of the engine for the boiler. When the Chief, corrects him, however, the visitor gets angry.Well, long story short, the Chief winds up skewering this poor soul with facts and logic, and I literally made popcorn.