Everyone is wrong, we live in a wonderful world where everyone can be wrong.

They can't both be not wrong.

I disagree, but I can't agree either. Do we have a deal?

I was going more for getting the classic response, from the old story:

Two men disagree and they bring a local wise man to listen to them. He listens to the first guy making his case, and tells him:

- You're right.

The other guy protests: Hey, here my side too. So the wise man listens to his side of the story too, and then tells him:

- You're right.

A bystandander witnessing this scene then calls out to the wise man:

- They can't both be right!

And the wise man says:

- You're right, too!

So true, reb Tevye.

the right word is "irrelevant".