LSAT 145 | Section 4 | Logical Reasoning: Q25

LR Question 25 Explanation

QUESTION TEXT: Many conceptual categories are parts of dichotomous…

QUESTION TYPE: Flawed Parallel Reasoning

CONCLUSION: We should abandon dichotomous categories.

REASONING: There are some exceptions to dichotomous categories.

ANALYSIS: This argument makes a perfectionist error. It’s like saying that we should abandon all buildings because some buildings have structural flaws.

So the parallel argument will say that something should be stopped because a few examples are bad.

A lot of the detail in this argument (matter to energy, life forms being both animal and plant, etc.) is just that, detail. It’s not structurally relevant to making a parallel argument.

___________

1. This is a good argument, if the consultants’ report is correct.
2. CORRECT. This matches. The fact that some anti-anxiety drugs are bad doesn’t mean that all anti-anxiety drugs are bad.
3. This is a good argument. All drunk drivers are dangerous so we should get all drunk drivers off the road.
4. This doesn’t match. The stimulus was talking about all (or almost all) cases of dichotomous classification, whereas this answer is just talking about one specific set of peaches.
5. This is a pretty good argument. The author has shown the budget is flawed. So presumably the budget should be replaced, unless for some reason that’s impossible.