Assuming the chance of a lab leak is non-zero, it is worth considering how this will ever end. - If there was any hard evidence actually proving they had SARS-CoV-2 in the lab before the pandemic, it will be long gone. Only an independent full access forensic level investigation would ever find any sign that evidence was destroyed, and that is never going to happen. - It seems extremely unlikely to me that anyone fro…
Evidence could come from communications. Such a large scale coverup would have required quite a lot of exchanges. Even with China being somewhat opaque and inaccessible to foreign intelligence, there could be digital trails.
(i.e. politically punished by the west for covering up facts is fine but scientifically concluding this proves a leak is not.)