"You can always win the argument if you're free to change the rules."


True. But does it really matter? The Universe doesn't care whether or not you win the argument. ;-) Only your own ego cares, and your ego is an ephemeral thing that passes away.

The great thing about discussing things is not winning the argument, but discovering and learning new things (or from the Spirit's point of view: remembering what you had temporarily forgotten, due to the descent into matter and duality).