I completely agree. Global warming debates are well-suited for this: first get the "denier" to agree that the physical mechanism is valid. If you can't agree o

I completely agree. Global warming debates are well-suited for this: first get the "denier" to agree that the physical mechanism is valid. If you can't agree on physics, then there's no point in continuing. If you can, great, at least he/she can't question the physical mechanism when they're back into a political/economic corner.