I believe the burden of proof response was in relation to the statement, "if a company can't demonstrate to a lay person that a chemical isn't dangerous".
That would be asking them to "prove a negative" (really, it's proving a universal claim, not a negative claim, but 'negative' is the popular tagline). This cannot ever be done. All you can do is show that there is no credible evidence that it is dangerous. At the point, the burden of proof lies with the the claim that it is, in fact, dangerous.
That would be asking them to "prove a negative" (really, it's proving a universal claim, not a negative claim, but 'negative' is the popular tagline). This cannot ever be done. All you can do is show that there is no credible evidence that it is dangerous. At the point, the burden of proof lies with the the claim that it is, in fact, dangerous.