Faulty and even dangerous use of the phrase “supposed to.” It implies a pressure to conform to some standard of etiquette or game rule. “You’re supposed to keep your elbows off the table.” “You’re supposed to wait for the umpire to say ‘play ball’ before you pitch.”

If I were teaching a shop class, and I were to hear one of my students say “you’re supposed to use a push stick when doing thin rips on a table saw,” I would say corrective action is necessary. While yes, using a push stick while performing thin rips is good practice, use of the phrase “supposed to” implies an attitude that it is the shop teacher’s pet peeve, and that the student will be free of that pointless ritual once out on the job.

You use a push stick because a table saw is a device designed to tear the bodies of living things apart, and rapidly. If you touch the blade, your body will be torn apart, and rapidly. While performing a thin rip with your bare hands, your hands will pass very close to the blade, anything goes wrong, a kickback or similar calamity will hurt you in ways a doctor can’t fix. Push sticks are PPE, we use them so we don’t get injured, not because “it’s the rules.”