Might someone still claim — transferred without infection beyond the lab?
Given the available evidence how would "Confirming zooinosis outside of the lab" be done?
> Finding the animal reservoir…
In bats? In intermediary animals?
Apparently "No reports are known to be available for SARS-CoV-2 test results from these mammals at the Huanan market" and "we do not have access to any live animal samples from relevant species" and "The animals on these farms (nearly 1 million) were rapidly released, sold, or killed in early 2020 … apparently without testing for SARS-CoV-2 … Live animals sold at the market … were apparently not sampled either."
So even "a proper investigation" will be insufficient.
> … every day the natural source isn't found should increase the odds…
Hardly. Let's make a wild ass guess that vastly more resources are being focused on the next Tampa Bay Buccaneers NFL game, than on finding "the natural source".
What if "the natural source" was destroyed as part of the tear-down of that particular live animal trade?
China has vast resources and every reason to try and track down the natural source.
But yes, you're right, it's possible we can never know. And thus we should act upon the probability distribution of the cause behind millions of deaths, and try and improve the safety of both wet markets and labs.
Might someone still claim — transferred without infection beyond the lab?
Given the available evidence how would "Confirming zooinosis outside of the lab" be done?
> Finding the animal reservoir…
In bats? In intermediary animals?
Apparently "No reports are known to be available for SARS-CoV-2 test results from these mammals at the Huanan market" and "we do not have access to any live animal samples from relevant species" and "The animals on these farms (nearly 1 million) were rapidly released, sold, or killed in early 2020 … apparently without testing for SARS-CoV-2 … Live animals sold at the market … were apparently not sampled either."
https://www.science.org/doi/10.1126/science.abp8715
> … how to prove they haven't tampered…
So even "a proper investigation" will be insufficient.
> … every day the natural source isn't found should increase the odds…
Hardly. Let's make a wild ass guess that vastly more resources are being focused on the next Tampa Bay Buccaneers NFL game, than on finding "the natural source".
What if "the natural source" was destroyed as part of the tear-down of that particular live animal trade?