The outside asks, what evidence do you have that you are right and the other person is wrong.
Alternate solution: Maybe you are both wrong. Maybe you are both right. The second possibility is easier to eliminate than the first. Perhaps if you are both sure, you could bet money on the outcome, if your argument is about reality?
their or there
your or you are
Alternate solution: Maybe you are both wrong. Maybe you are both right. The second possibility is easier to eliminate than the first. Perhaps if you are both sure, you could bet money on the outcome, if your argument is about reality?