I broke out a VFR sectional and the CFI asked "what is that"?
I was teaching a class on our electrical system earlier this year and was walking the class through our dual generator failure checklist. I mentioned that one option was to turn off the batteries and use dead reckoning to divert to a suitable field. Arriving at the divert field, turn the batteries back on so you could regain trim, flaps and gear for a normal landing. One "kid" in the class was looking at me like I had a third eye in the center of my forehead.
He asked mockingly, "What's this dead reckoning?" I thought he was joking and flippantly said, "You know, clock-to-map-to-compass. It's not where you are, it's
when you are." He snorted and scoffed. Thought the concept was ridiculous. The next day was the last day of the class. On leaving, he approached me and told me matter-of-factly that there was no way you could navigate by this
so called dead reckoning with merely a clock a map and a compass. And he was serious!