What does the Question Stem tell us?
Flaw
Break down the Stimulus:
Conclusion: Good way to get over fear of X is to do X repeatedly.
Evidence: More than 50% of people who parachuted only once were crazy scared by it. Less than 1% of people who have done it more than ten times are scared by it.
Any prephrase?
When an argument relies on a correlation or statistic, we usually want to think of other ways we could interpret, explain, or frame the statistic. Some people might have intuited where LSAT was going with this, but others wouldn't. An analogous argument could be, "A good way to make yourself like the taste of something is to eat it over and over again. Of the people who have eaten sushi only one, less than half of them thought it tasted good. Meanwhile, of the people who are regular sushi eaters, more than 98% of them think it tastes great." Okay, well maybe it's not that "eating it over and over again makes them think it tastes good" ... maybe instead it's that "thinking it tastes good makes them eat it over and over again"!
Correct answer:
E
Answer choice analysis:
A) Did the author make this Assumption? No. Any claim of the type "the more X, the less Y" is very strong. It means there is a constant relationship between two variables. The author never committed herself to such a strong idea. Also, this is talking about engaging in a NUMBER OF dangerous activities, whereas the conclusion is talking about getting over the fear of AN activity.
B) Would this weaken? Do we need to hear about people who have parachuted 2-9 times? It could help the author's argument if we knew that as they went from jump 3 to jump 4 to jump 5, etc. that their fear slowly went down. But failing to talk about these jumpers isn't a primary objection we would make to this argument. We can complain about the actual facts presented, without even needing to get into data points not mentioned.
C) Does the author Assume this? It's extreme: "unless". Does she commit to the idea that "If you haven't tried something, you CANNOT know how frightening that thing is?" No, she doesn't commit herself to that, and those ideas don't match up with the core.
D) Would this weaken? If people would be better off not scaring themselves, does that harm the author's argument? No. She's not arguing that you'd be "better off" by getting over your fear. She's just arguing that "a good way" to get over a fear is to use this method. I could tell you a "good way" to get arreseted without believing that you're "better off" getting arrested.
E) Would this weaken? Yes! If the people who parachuted a bunch were not frightened to begin with, then the author has NO evidence that repeatedly parachuting LESSENED THEIR FEAR over time. It was never there in the first place! This also speaks to the reverse causality from the sushi analogy. It's not that "parachuting more than 10 times made them unafraid to parachute"; it's that "being unafraid to parachute made them parachute more than 10 times".
Takeaway/Pattern: When an author interprets a statistic / correlation to mean some Causal conclusion, our primary way of objecting is, "How ELSE can we explain or interpret that statistic / correlation?" The two biggest alternative interpretations are Reverse Causality (being fearless caused them to parachute more) and Other Cause (for example, "being less fearful and being able to afford the expense of parachuting many times are both symptoms of being wealthy")
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