contractions - Is it okay to say "Yes you're." instead of "Yes you are."?

I was having an SMS conversation with a friend and somehow "Yes you're" came into play in retaliation to a comment.

Example:

Person 1: "You are bad at English".

Person 2: "No I are not.".

Person 1: "Yes you're".

Is that acceptable?

I would assume that it is.

Think of "don't".

You can say:

"No, don't."

or

"I don't."

and it is a contraction like "you're".

So, is it okay?

Answer

No, this is unidiomatic. "You're" always requires a subjective completion. (And to my ears, it sounds completely wrong.)