A rational proof being that the conclusion is undoubtedly true given that all the premises are also all true.
I feel having one of these would do wonders for conversation. Understanding that taxation is theft would be a kind of intelligence test of the common man before discussing politics, government, economics, etc.
What spawned my idea for this rational proof was the caller Stefan had in their recent Facism video where the caller refused to accept that taxation is theft.
Even if you can convince people that taxation is maintained through the use of force, they, as a last resort, generally respond with "well it IS theft... but it technically isn't because of XYZ."
While it should be simple enough to understand the definition of theft, other's require... much much more convincing.
Has any ever been made before?