I think a useful concept with this is the legal doctrine of adverse inference.[1] If one of the parties to a lawsuit conceals or destroys important evidence, it is assumed that that evidence would have been unfavorable to the party which concealed or destroyed it.
So, while we may not be able to know for sure how COVID-19 originated, we can certainly draw an adverse inference from the behavior of the Chinese government.
So, while we may not be able to know for sure how COVID-19 originated, we can certainly draw an adverse inference from the behavior of the Chinese government.
[1] https://en.wikipedia.org/wiki/Adverse_inference