https://classic.7sage.com/lesson/introducing-new-drugs-strengthen-question
Looking to get a better idea of the logic on answer choice E, which is an incorrect answer choice.
I understand that A is the correct choice because reasoning from an example which is already the best case compared to alternatives strengthens the argument, given the premises.
Comment from @DumbHollywoodActor was helpful in shedding some light on E's logic:
(E) mixes up the logic. If you take the contrapositive, you can see it more clearly: “if most new drugs shouldn’t be on the market, then the new antihistamine shouldn’t be on the market.” The argument provides the necessary condition, but that doesn’t mean it gets to conclude the sufficient condition.
However, I would like to understand this statement better: The argument provides the necessary condition, but that doesn’t mean it gets to conclude the sufficient condition.
We must accept the premises and the conclusion as true for LSAT questions. I get that if we accept the premise as true, that is affirming the necessary condition of the logic in choice E. But, if we accept the conclusion as true, that also satisfies the sufficient condition of the logic.
Put simply, after reading the argument I am left with these two true pieces of information:
P: antihistamine should not be on the market (A)
C: these new drugs should not be on the market (B)
then E gives me this logic of "these new drugs should not be on the market" --> "antihistamine should not be on the market"
So, I'm left looking at that B--> A statement, and holding A and B in my hands, with no understanding of where to plug them in. If I plug B in, then I get A, but apparently that is not the correct answer.
Is it because the reasoning in this argument is inductive (that is, moving from a specific example to a general rule) and so it isn't helpful to say that "this general rule is the case" therefore "this specific examples is the case," since the argument is not applying a rule, but rather trying to support one?