I am speechless. Even though the truth is the truth, there will be nothing gained by explaining the truth here. This person knows the truth but is just looking for a loophole to circumvent it. When you have someone with an agenda, a defense attorney mindset, and ample idle time, you will get nowhere with the truth.
Keep this going if you are looking for amusement, but hold no illusions about actually enlightening this person. It won't happen as this person doesn't even want to be enlightened. This person just wants to argue at all costs. He is dug in eyeing you as you come up the hill.