Fully Functional.
I found big bang theory a lot more palatable if you consider it as an unreliable narrator story, with penny as the narrator. It’s not what actually happened, but what Penny remembers about it. All the geeky/nerdy stuff gets filtered. Only the surface, superficial stuff gets remembered, and even that is distorted. That is why it plays on stereotypes so much.
My wife likes BBT, I’ve learnt to tolerate it at best.
I did grad school in planetary science while BBT was airing. I hated it. I could go hang out with my friends and have much funnier nerdy convos. “I’ll buy you a beer if you can prove to me that the electron exists.” – one of my favourite remembered starts to many hours of drinking one day.
My dad watched BBT and was pretty convinced it was a documentary of my life, or close enough. I told the above story to my dad, and it did nothing to dissuade him.
My biggest memory regarding BBT was the time I was hanging out with a GF family and when her mom’s friend asked her how she’d been doing/what was going on with her life she mentioned that she had been playing D&D with some of her friends (no details about it or anything just that) and her mom’s friend immediately started cackling “IT’S JUST LIKE BIG BANG THEORY!”. Really cemented my disdain for the show knowing what kind of person enjoyed it.