Check if your oven thermostat is just plain lying.

That habit of checking instead of guessing shows up everywhere once you notice it, not just in a shop. A guy I know who does home inspections says the same thing about moisture meters, that skipping the reading and going by feel is how you end up replacing drywall that was never wet. The tools exist because our hands lie to us more often than we want to admit.

Oh man, the worst part is that the mistake compounds. Get to the bridge late, take the wrong turn, then every decision after that is made by a tired brain that's already proven it can't be trusted. My buddy and I did something like this on Tiger Mountain where I was sure the junction was at a certain spot, but we'd already passed it, so we spent the next hour "just checking" side trails that all looked right in the dark. The real kicker is that the guy who was mad at you will now bring this up on every hike for the next five years. You'll be standing at a trail sign and he'll go "hey is this the bridge from the Snoqualmie thing" and you just have to eat it. The only fix is to go back and do the loop right so you overwrite the bad memory with a good one.