The evidence - you cannot prove a negative. So the answer is to assume it’s right, then show the evidence is wrong. Part of the problem here is that there’s been a serious accusation and the Left’s response has been gaslighting. They don’t want to know if the election was stolen because they want it to happen again.
How can there be this amount of evidence of a conspiracy to corrupt the democratic process and there be no concern for what the truth is?
This is inverting the burden of proof in a very seriously erroneous way.
Say for example I assert, there is a ghost on the upper shelf of my closet. Does that mean we should all assume that is true until you prove it is false?
Fairly clearly not. That is what is meant by the burden of proof is on he who asserts existence. In this example, me because I asserted that there was such a ghost.
Applied to this case. The assertion that there has been widespread systematic voter fraud is an assertion that a specific type of fraud has occurred. Lacking at least plausible proof that this is the case, it is reasonable to assume it has not.
But another way to consider this is in terms of non-falsifiable beliefs. What evidence, which could exist in principle, would you find persuasive that no such fraud has occurred?
If one can't name any, then it is a non-falsifiable belief. These have all sorts of logical problems.
Finally, there is the more scientific way to consider the evidence and that is to objectively consider the evidence both for and against the proposition. What sort of evidence is there that coordinated systematic fraud occurred in the 2020 presidential election? I have been asking for some months now for an objective overview of the evidence on both sides and have not heard of one. The film "2000 Mules" was said to be worth considering in this regard. In my view it fails to present even a plausible case to back up its assertion to the effect. But I remain very interested in such an objective overview if one exists.