Looking on the internet deeply has found these results:

I know what the problem is is the most popular phrase on the web.

I know what's the problem 1472,000 results on the web	I know what the problem is 11,880,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Once I know what the problem is, I should also like to know who is responsible for the situation. And second of all, I think I know what the problem is. I know that it is difficult, I know what the problems are, Commissioner, and they are not easy to resolve. I'm so sorry... I don't know... what's the problem. I know what the problem is. Because I know what the problem is. I talked to Dr. Chandler, I know the problem well. I'm a good shrink. I know what the problem is.	I do know what the problem is man. I know what the problem is. Because I know what the problem is. Once I know what the problem is, I should also like to know who is responsible for the situation. Look, I know what the problem is, but why is it your problem? I don't know what the problem is. And second of all, I think I know what the problem is. I'm a good shrink. I know what the problem is.

I know what's the problem

1472,000 results on the web

I know what the problem is

11,880,000 results on the web

More popular!

Once I know what the problem is, I should also like to know who is responsible for the situation.
And second of all, I think I know what the problem is.
I know that it is difficult, I know what the problems are, Commissioner, and they are not easy to resolve.
I'm so sorry... I don't know... what's the problem.
I know what the problem is.
Because I know what the problem is.
I talked to Dr. Chandler, I know the problem well.
I'm a good shrink. I know what the problem is.

I do know what the problem is man.
I know what the problem is.
Because I know what the problem is.
Once I know what the problem is, I should also like to know who is responsible for the situation.
Look, I know what the problem is, but why is it your problem?
I don't know what the problem is.
And second of all, I think I know what the problem is.
I'm a good shrink. I know what the problem is.