I can’t really agree with that.
I can’t go along with that.
I don’t see quite eye-to-eye with you on this.
I have a slightly different take on this issue.
I have to disagree with you on that.
I have to disagree with you.
That’s not how I see it.
That’s a good idea, but needs some refining.
That’s a good idea, but it could use some development.
I beg to differ.
You’ve made a good point, but I don’t quite see it that way.
I don’t go along with that at all.
I don’t agree with that.
I don’t know how you can think that.
That’s just one way of looking at it.
It’s clear we don’t see this the same way.
I think you’re wrong.
I don’t believe that’s accurate.
I don’t believe that’s right.
I think that’s way off the mark.
I can’t believe you just said that.
How can you possibly think that?
How can you say that?
That’s simply not right.
Where did you get that idea?
That’s the most ridiculous thing I’ve ever heard.
You can’t really mean that.
That’s just off the wall.
You really believe that?