Marc Elias argued this case before Judge Russell. Elias is about the most radical leftist democrat lawyer in the DC swamp of crooked lawyers. Nevertheless, his argument was not that he could disprove Kamzol's evidence, but that Kamzol did not have the qualifications to present the evidence and that Kamzol did not meet all the impossible deadlines and requirements set by the leftist court in the hurried case. That is not proof there was no fraud but a failure to prove the evidence was false.Regarding your 2nd example, the court concluded that Kamzol's data was not credible.
The court concluded that the Kamzol's data was not credible, and Russell wrote that his methodology "had little to no information about or supervision over the origins of his data, the manner in which it had been matched, and what the rate of false positives would be. Additionally, there was little or no verification of his numbers."
In the 35-page order, Russell also wrote that "the record does not support a finding that any Nevada voter voted twice." - https://www.aol.com/news/fact-check-voter-fraud-claims-232634307.html
Marc Elias and Legal Challenges
Marc Elias, a prominent Democratic elections attorney and founder of the Elias Law Group, has been involved in multiple high-profile legal actions — but there is no credible public record of him being charged with a criminal offense.Elias is best known for his role in shaping Democratic campaign and election rules, serving as general counsel for Hillary Clinton’s 2016 campaign and John Kerry’s 2004 campaign, and for leading the Democratic National Committee’s legal defense of the 2020 election results Wikipedia. In recent years, he has represented Democratic candidates and groups in litigation over voting laws, including: