I haven't advanced any theory, and even assuming that I did, all you could possibly do is attack my assertion. That my theory may (or may not) have an evidentiary basis has no bearing on anyone else's theories, unless they substantively overlap. Since your theory is oppositional, they are disconnected. You are shifting the burden and acting as though you don't need to present your own, independent proof.
or:

"There is no confirming evidence that positively demonstrates every detail of a position I assigned to you, therefore you are wrong and I am right."

"Uh, that's cool and all, but then where is your positive evidence proving
your thesis?"

"There is no evidence, therefore you can't disprove my thesis."

"You just said a second ago that a lack of positive, detailed evidence demonstrates probable falsity, so how can you-"

"SHUT UP IDIOT, THERE WAS NEVER A
MOON RUSSIAN RESETTLEMENT AND YOU'LL NEVER PROVE YOUR CONSPIRACY THEORY, RETARD!"