Ah now you're asking some good questions and getting some good responses which you still need to sift through.

What, if ...

My ideas of valadating is to say, "I could see how you might feel that way (or think that way)".
W: Oh no, you don't!

"I understand what you are saying".
W: Oh, no, you don't!

"I'm sorry you feel that way".
W: I'm tired of your games!

Then I'd go with this one:
"Or, just nod you head that you are listening but it doesn't mean you agree."

W: "Those are nice boobs. I wish I had boobs like that."
Pin: Ya, what a waste ;-)

I think you'll have to experiment a little (on small things) and see what works with this particular W.