Not exactly what the OP was looking for, but probably close enough …
Some years ago I belonged to a group of 6-10 middle managers that ate lunch together most days. I was the (slightly) senior member and quasi alpha dog of the informal group.
One of the younger ones was a 23-year old true blonde from a small town in Texas. Sweet as could be and with all the brains and sophistication and education of a 10-year old. This despite having a 4-year degree in a sensible major from a readily recognizable college in Texas. She was (in)famous for her naivete, which bordered on criminal stupidity. Sweet though, very sweet. Her Texas ack-SAAAY-ent was especially endearing as we were on the West Coast.
One day at lunch we were all discussing sailing on the nearby lake and the idea of speeds measured in “knots” came up. She asked what that was, and I explained (sloowly) that “knots” means nautical miles per hour and that a nautical mile was the unit of distance for boats and it was 15% longer than a regular land mile like in your car. She said “Okaaay …”, her internal wheels obviously spinning at max RPM without getting much traction.
The conversation moved on to other topics and about 5 minutes later she announced in that big child voice of hers: “Oooh, I get it!”. Everyone froze; this promised to be real humdinger.
After 15 pregnant seconds of silence I gently asked, “OK, Lisa, what do you get?”
She said “I know why the boat miles are longer than the car miles!”
“Why’s that, Lisa?”
“Because out in the ocean there are big waves and while the boat’s going up the waves it slides backwards some. So the extra 15% takes care of that.”
I nearly pissed my pants. Somebody else at the table was unwise enough to take a drink just as she started to answer. Soda everywhere.
I left that job a year or so later; I sometimes wonder whatever happened to her.