I doubt that Dominion can prove that any falsehoods were said with malice.
I would think they would only have to prove that their company was slandered without a factual basis, and suffered reputational damage because of it. That could include claims like:
- they worked with the democrats to fraudulently steal the election
- they designed their machines to enable fraudulent elections
It wouldn't be up to Dominion to disprove this, but up to Guiliani etc to prove their was a factual basis for their slander of Dominion. And I think, given the degree of the slander, Guiliani etc would have to possess a very strong factual basis.