Sigh. Must you resort to this crap yet again?
For the final time - you cannot prove true that which does not exist
No problem here. This can be demonstrated, by (for example) showing that the assumption of truth leads to a contradiction. Logic says that by demonstrating a contradiction, it's possible to prove certain statements false. (And thereby, incidentally, proving a negative: X does not exist.)
and for which there is no evidence.
This, however, has no place in the discussion. A lack of evidence is not the same thing as "non-existence." Non-existence implies lack of evidence, of course, but the converse is not true. (I'm sure you remember this from your logic classes.)
You can't Prove a Negative.
Symbolically, then, in the form you've provided above, you're saying that "Proofs of Negatives" do not exist. However, "you can't prove a negative" has the unfortunate property that it is a negative.
If you can prove then statement, then it is a false statement -- a classic dilemma.
And of course, if you cannot prove this statement, then it is without meaning: a self-negating statement.
So please curb your unpleasant tendency to toss insults instead of logic, and PROVE YOUR STATEMENT.
You are Conflating proving "statements" false with proving there is no physical evidence for that which does not exist.