Sure!
You're correct, the conclusion could absolutely still be correct.
The point of a correct Weaken answer is not to
falsify the conclusion, it's to weaken it ... to introduce at least some additional doubt as to the validity of the conclusion.
You'll (almost?) never find a correct answer to Strengthen that PROVES the conclusion nor a correct answer to Weaken that REFUTES the conclusion.
You're only asking yourself, "Does it move the needle at all in favor of believing it or not-believing it?"
For example, consider this argument:
John is crying. Thus, he must be cutting onions.
Would this weaken?
(A) John's dog died this morning.
Yes!
Of course it would weaken; it provides an alternative explanation for why John is crying. Did I just prove that John is crying over his dead dog? No.
Is it possible he already mourned his dog (or didn't like the dog in the first place) and is now just crying because he's cutting onions? Yes.
But it was still a correct answer to a Weaken question.
When you compare the five answers (according to my previous post's explanation) you're looking at
(A) kinda Weakens
(B) kinda Strengthens
(C) kinda Strengthens
(D) just irrelevant
(E) kinda Strengthens
Clearly, (A) is the answer that
most weakens. That's how we have to judge these.
(A) makes me worry a little less about what the conclusion is saying ... "oh, maybe I don't need to worry that much about the public's oversimplified understanding since TV watching isn't the ONLY source of news information that network TV news watchers are getting." Notice they amped up the strength of language with "much more likely" and "habitual readers" to give this some persuasive oomph.
This is just a correlation, but it actually strengthens (not proves) the notion that maybe watching a 30 second story on network news makes someone more likely to have an appetite for the full story in the newspaper. In that sense, watching the TV news might be HELPING the public have a more sophisticated understanding.
If you like the pure, mathematical logic of Sufficient Assumption / Principle Justify / Inference, etc. (as I do), then Strengthen and Weaken will probably be your least favorite question types (as they are for me).
