I’m under no obligation to prove a negative. Wikipedia made the positive claim. It is entirely its own obligation to document the claim. And since Tim mentioned logical fallacies, it is worth noting that his argument contains a major one: the thrust of is argument, put in general form, is “You can’t prove my claim is wrong, so therefore my claim is right.” Anyone with even elementary understanding of logic can see the error here.
That Tim will not concede that Wikipedia failed to document its claim is more proof of Tim’s partisan approach (as if any more proof were needed).