In most circumstances, it is illegal to import prescription medications from Canada into the United States for personal use. The FDA (Food and Drug Administration) cites safety reasons for the existing law. A proposed law would allow Americans to buy their medicines from other developed countries if the drugs are safe and prices are lower outside the US. Opponents object that, in general, laypersons lack the specialized knowledge to evaluate medications purchased from unverified sources. But since the government has the final say as to whether an outside drug producer is safe or not, the objection provides no grounds for concern.
Which of the following would it be most useful to establish in order to evaluate the argument?