Something people do all the time.
You'll often hear people proudly stating that they don't know the first thing about computers or "math is for nerds".
I've been known to do it too. I'll act proud that I don't know anything about sports. "Who won the World Series in 1972?" I have no idea, and I'm proud that I don't. Why? Because this means I have better things to do than waste my time watching sports. (By golly, there are a million Starship classes from Star Trek that I gotta learn to recognize at sight!)
The problem is that not wasting time watching sports may be a good thing, but it doesn't mean that the time was better spent. Maybe you just played Quake instead.
What you should flaunt, if anything, is what you learned while other people learned sports scores, not what you didn't learn.
Knowing basic math doesn't make you a nerd, it just makes you a not an idiot.
"There's a 50% chance of rain saturday, and a 50% chance of rain on sunday, so there's a 100% chance of rain this weekend.