I could be mistaken, but I tend to think of "burden of proof" in a statistical sense, like Occam's Razor. Example... your friend says "Look out! There's a car coming!" Now, you could 1) Put the burden of proof on your friend and wait for more information, 2) Put the burden of proof on yourself and turn your head to look, or 3) Fucking jump.

All have their place.

I'm just saying that if you rely too heavily on burden of proof, sometimes you will get hit by a car that demonstrably doesn't exist because the person who claims so hasn't bothered to prove it to your satisfaction yet, while you waited upon their efforts as if they were a slave feeding you grapes in ancient Egypt.

Ya know? ;)