It would take one or more truly impressive demonstrations of heat production
All of the major cold fusion experiments are truly impressive demonstrations of heat production. That is why they convinced scientists at 180 labs to replicate. That is why Heinz Gerischer, the Director of the Max Planck
Institute for Physical Chemistry, wrote: "there [are] now undoubtedly overwhelming indications that nuclear processes take place in metal alloys."
Seven_of_twenty is not impressed either because he has not looked at the results, or because he does not understand them. If the researchers in New Zealand are not impressed, that is because they have not looked. I know only three scientists who looked carefully at the results but were not impressed or convinced: Huizenga, Morrison and Shanahan. There may be some others, but they did not publish papers so I don't know whether they looked or what they concluded. All other evaluations I have seen were written by people similar to Seven_of_twenty who have no idea what they are talking about, and who get every detail wrong.