Depends on how they’re dumb. Your example is just amusing and pretty innocent - that doesn’t bother me at all. What would bug me is if it’s something that’s clearly screwing up their life. Like if they can’t hold down a job or get through basic everyday tasks without constantly fucking it up.

For me, intelligence isn’t about what you know - it’s about how you think. Can she grasp that Vietnam is an actual country once you explain it to her? If yes, then she’s not dumb - she’s just ignorant or uneducated. I can live with that. Especially with a 10/10 personality.

Yeah, she got it, and she was actually curious about it. She also admitted on her own that she’s not the smartest person, she found school boring, and her parents basically told her to ignore it since they’d take care of everything. They have money, so she doesn’t need to work if she doesn’t want to. She mostly just hung out with her friends and did leisurely stuff.