cách nói thay thế "I don't know"

I can find out for you
I haven't got the faintest idea
I don't know anything about…
I'll get back to you on that one
I'm fraid. I have no idea
It's beyond me.
Let me look that up for you
What do you think?

I'm not the best person to answer that
Search me
That's not my area of expertise, I'll ask…
Who knows?
That requires a bit more research first
I'll find out and let you know
Beats me


I have no clue/idea
I haven't looked at that yet
I'll double check and let you know.
I'm not 100% sure on that
It's a mystery to me
Let me check on that
That's good question. I'll check it
I've been wondering the same thing

I'm not sure / unsure
That's a good question but I don't know
What do you suggest?
That's exactly what I'm seeking to answer
Let me find out for you
I haven't had time to think that through year
I have't got any clue/Idea