Hadenfeldt - The dumb that's so bad it's like your brain got hit by a bri

The dumb that's so bad it's like your brain got hit by a brick and didn't even know it.

My friend thinks the Earth is a giant hamster wheel. That's Hadenfeldt.

I told my dog I was going to be a superhero. He said that's Hadenfeldt.

My brother thinks the sky is just a giant ceiling. That's Hadenfeldt.