Mine is that at my age (barely made it into Gen Z on the old end) I just found out today that a Bo Weevil is an insect (beetle) and not some kind of mole or similar rodent.
That sounds like aphantasia.
Until maybe 10 years ago, I thought that was some exceptionally rare condition, and that I’d be instantly able to tell who had that by how they acted because that person would be so weird or different than everyone else.
Turns out lots of people have it, including my mother.
It was so weird to me, because I have an inner monologue and it’s pretty much always going. And I can “hear” it inside my mind. I can visualize anything I can think about, even watch “movies” with a “soundtrack” in my own mind. It’s so omnipresent in my life, and that’s just not how everyone’s brain can work.
And of course, people who don’t have that in their mind are no less intelligent or anything. Maybe it’s easier for them to focus than it is for me! Lol
But when I first heard about it, I wondered things like, “How can they read?” or “How can they know what something looks like from a description, or how can they understand how something would be moved in a 3D space without actually moving it?” Lol
I do have an inner monologue and when I try to visualise something the closest thing I can get is my inner monologue describing the features of the thing I’m trying to see. But no picture appears. It’s like my brain only saves the concepts of things, like an apple is round, red, has a little brown stem etc.