A scientific law? What the fuck are you talking about? I mean you could be sure with 5 sigma orso that an entity with this genome was designed by a person with a certain intent, or was the product of natural evolution. There's no such thing as knowing with absolute certainty in any kind of science, all you can do is reject the null hypothesis with n degrees of confidence. In this case, you can reject that SARS-Cov-19 was developed by artificial genetic manufacture within an acceptable degree of certainty.