Super post, LXA.

I have a good, longtime friend who has a PhD and is a pilot with many ratings. He owns a twin engine plane he's flown over the North Pole. One day I asked him if his plane's engines were turbines or piston engines. He was confused and it was because he didn't know the difference between the two types of engines. He didn't know what type of engines he was flying.

He's very intelligent. He was a tenured professor at a major university. He's also vaxed all the way up.