>> “Why doesn’t he defend himself before the American people by GOING ON THE OFFENSE and demand specifics and evidence that can be weighted and disproved if false?” <<
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If you were a tad smarter, you would know that a negative cannot be proven.
Anything he does beyond denial and continuing to campaign just plays into the mediots hands.
Contemptuous personal comments aside, a lie if it's specific enough can be disproved.
Better put, a lie, if it contains enough specifics, can be countered with evidence to the contrary.