IMO only means "I disagree", and implies much more a difference of values than of cognitive capacity.
That's not a bad idea. However, I would propose a few small improvements to - completely different plan follows
When it sounds stupid but idgaf: Sounds good!
When it sounds stupid and igaf: thanks for bringing up that point! Definitely I agree with what you're saying, but don't think it really applies here cause... As I mentioned yesterday... Sorry if I wasn't super clear before but...
I'm sorry, this is going to sound ignorant. It sounds like there is more to this than it first seems. Go silent and wait
My go to at work
It doesn't translate fully to English, but I always like this one: "Have you considered giving your studies another chance?"
"That's not a reasonable [opinion/position/take/xyz] and is going to [cost us money/make us look bad/blow up in our face/etc]."
"There is a large juxtaposition between expectation and result." Once used that when asked to give feedback on a store manager when I was a security guard.
i hhhhhhaaaaaate corporate speak. it's the biggest reason i fuck up at interviews. just say what you mean.