Lots of great questions here!
The question stem is a bit different from your classic strengthen/weaken questions, as you all have noticed! Let's circle back to a question question from above:
inesa909 Wrote:Is our task to undermine B's argument or to strengthen A's or is it possibly something else (such as identifying both A and B's conclusions and finding the discrepancies between them)
We need to strengthen A's argument
in relation to B's argument. Directly weakening B's argument would do the trick! But if we're going to strengthen A's argument, we have to do it with B's argument in mind. Let's break down the cores a bit to see what that means:
ALBERTPREMISE: Causal link between PAHs and cancer is not proven
CONCLUSION: Regs to decrease the PAHs in car exhaust aren't needed
ERINPREMISE: PAHs also cause heart and lung disease
CONCLUSION: These regs would save these lives.
Albert's original argument is that the regulations aren't needed because the 'danger' (cancer) isn't a real or proven danger. Erin's response is to bring up a NEW danger, completely unrelated to cancer (heart and lung disease). It's as if she's saying to Albert "Okay, so what if you're right that PAHs don't cause cancer - they still cause heart and lung disease, which is pretty bad!"
lsatzen Wrote:I was under the impression that Erin's response was meant to undercut Albert's premise that a causal link has not been established; by saying since scientists blame PAHs for causing these premature deaths, we can take their word as evidence for there being a causal link.
I think this is where you first when a little off course,
lsatzen - Erin's response doesn't address Albert's premise at all! She brings up a NEW danger the PAHs are responsible for,
separate from cancer.
Since Erin has introduced this new danger of PAHs, Albert has a few ways to respond to support his original argument. He could either show that 1) this new danger (lung/heart disease) isn't actually caused by PAHs
either, or 2) that even if this is a danger, the regs won't protect against it.
lsatzen Wrote:(D) however, clearly weakens Erin's response, because it makes her suggestion less likely to be an effective solution. According to (D), the regulations would reduce PAHs that are emitted via automobile exhaust, but it would overlook the PAHs being released via wear and tear. Exposing the overlooked possibility, that there could be more prominent sources of PAH emissions.
Now you've got it! With this, Albert could say "Okay, you're right, PAHs are evil incarnate. These regs are still dumb though, because they won't actually do anything about the majority of the PAHs cars are releasing."
Let's take another look at
(E):
lsatzen Wrote:(E), if interpreted the way above, only strengthens the premise of Albert's argument. But that's all it does. It does not strengthen the reasoning of the argument. Albert's conclusion is that the regulations are not needed, and the only reason he has given is that a causal link between PAHs and cancer has not been established. Albert mistakenly assumes that his support is relevant, but he has failed to make it relevant.
My idea of attacking the question seemed correct, but I misunderstood the application of the answer choice. I wanted to weaken Erin's argument, by strengthening Albert's argument, but (E) just does not do that.
I'd take this one step further - even if
(E) did strengthen the
reasoning in Albert's original argument, it wouldn't address Erin's totally valid point that PAHs are causing other, non-cancer bad things. If she's right, then it just doesn't matter whether cancer is in play or not, the PAHs are connected to death. Albert
has to deal with that PAH-lung/heart disease connection - either by denying it, or by showing that the regulations won't do anything about it.
As for the other incorrect answer choices:
tz_strawberry Wrote:Just wanted to double check why the other 3 wrong answers are wrong...
A: It does not matter what most auto manufacturers say...maybe other majority people agree with the regulation
[LSATGeek comment: It actually doesn't matter what ANYONE agrees with or disagrees with! This argument is about whether the regs are needed, not what people want/prefer/feel/believe!]
B: Whether it's known or not does not matter...and other than heart and lung disease and cancer is not argued
[LSATGeek comment: Albert could prove that PAHs don't cause any other disease in the universe, but so long as Erin is right that they cause heart/lung disease, PAHs are looking bad]
C: This could strengthen what Erin says...also Albert's point was, no regulation because no causal link is proven. So even PAHs decrease, this does not support what he originally said.
[LSATGeek comment: I'm not sure how this would strengthen Erin's argument. The real problem here is that it's a conditional statement. If we knew that auto use was set to decline substantially next year, then perhaps the regs wouldn't be necessary because auto exhaust (and PAHs) will be reduced even without those regs. But this answer doesn't tell us that auto usage WILL decline, it just says that IF if does then PAHs will decrease. That's awesome, but who knows if auto usage will ever decline at all?!]
Some great thinking in this thread!