Ask them, when you say "no evidence", do you mean that you have personally reviewed all of the evidence, and decided that none of it was credible?
or do you mean that you have literally never seen any of the evidence, and therefore you are absolutely ignorant about all of the evidence?
Because I’m pretty sure the video of an election worker pulling a box full of ballots out from under a table cloth, has never been “debunked”.
I'd ask them, so what about the person convicted in AZ of election fraud, or the one in AZ who plead guilty of election fraud and conspiracy, or in TX the dozen or so who were convicted of ballot harvesting and stuffing and selling votes, or the guy in Michigan, or the guy just convicted in PA of voter fraud.....etc.