>A: Come in.
M: Ah, Is this the right room for an argument?
A: I told you once.
M: No you haven’t.
A: Yes I have.
M: When?
A: Just now.
M: No you didn’t.
A: Yes I did.
M: You didn’t
A: I did!
M: You didn’t!
A: I’m telling you I did!
M: You did not!!