Is the following sentence correct? I think it doesn't make sense, but I am not so sure.
I don't know the question whether she will believe us.

Question

Is the following sentence correct?  I think it doesn't make sense, but I am not so sure.
I  don't know the question whether she will believe us.

Answer

I agree with you, the original sentence doesn't make sense.

But if you change it to :" I don't know the answer to whether she will believe us", or better still, "I don't know if she will believe us", then it becomes a lot more understandable.

Answer

Thank you, Joe.

Answer

You're right, Icespirit.  The sentence doesn't make sense, and there isn't enough there for me to figure out what it might mean.  Sorry.