What kind of evidence would convince Bobert?

Be specific.

The document in question makes an accusation. Does it have to be proven true or proven untrue?

If it has to be proven untrue that means Bush is guilty of the charges made in the document with out proof that they are legit.

It if has to be proven true that means Bush is innocent of the charges made in the document unless there is proof that they are legit.

Are people innocent until proven guilty or are people guilty until proven innocent?