"Yesterday, you told me to always look left. I have been practicing looking left and I am getting pretty good at it. But now you are saying I should look right."
"I don't remember telling you to always look left. I don't think I did."
"You did! You really did. Oh, I just wish I had a recording of you saying that."
"Knowing how passionate you are about being right, I wouldn't be surprised if you edited snippets until you had a passable recording of my saying what I never said."
"So, despite how close we are, you might not even be persuaded by a recording?"
"Ok, here's a proof. You like chocolate and I like chocolate. So, you advised me to always look left! Q.E.D."
"Just because you call it a proof and say things like 'Q.E.D.' doesn't make it a proof. That's no proof. I am not persuaded I told you that."
"Told me what?"
"I don't remember. Whatever it was that you said I told you. Oh, wait. I remember now that Henry was with us when I told you. Just ask him."
"Henry, did he tell me that?"
"Oh, so now you believe what Henry says but not me."
