Don:


Appeal    to Ignorance (Proving a Negative): an argument that asserts a claim is true    because no one can prove it is wrong; this shifts the burden of proof to the    audience or opponent rather than the claimant

This is correctly listed as a form of fallacy. BUT it does not address the question of this thread which asks whether or not it is possible to prove a negative. The fal;;acy described here is demanding that one disprove an assertion when it should be the asserter's burden to prove it.

That's different/


A