LSAT 118 | Section 1 | Logical Reasoning: Q25

LR Question 25 Explanation

QUESTION TEXT: Some visitors to the park engage in practices that …

QUESTION TYPE: Parallel Reasoning

CONCLUSION: Some visitors don’t know the practices harm the animals.

REASONING: No one who knows about the harm would engage in the practices. Some visitors do engage in the practices.

ANALYSIS: The structure is:

• Some visitors are doing the practice.
• No one who knows about harm would do the practice.
• Some visitors don’t know about the harm.

The matching structure we’re looking for would be:

• Some A are B.
• No C are B.
• Therefore, some A are not C.

Look for that structure in the answer choices.

___________

1. This is a flawed argument. We don’t know whether the people who will be fired are those who worked in the department. It could be that everyone in the department is saved and the “some” fired are all outside the department.
2. This isn’t ruling people out of a group. The structure is: Some A are B. All A are C. Therefore, some B are C.
3. CORRECT. This matches the stimulus. Some A (polled people) are B (live outside the city). No C (city voters) are B. Therefore, some A are not C.
4. The stimulus began with some, not all, so the structure differs. Here, the structure is: All A (original planners) are B (responsible). No A are C (admit responsibility). Therefore, some B are not C.
5. This is also a flawed argument. It draws a conclusion about city council members from facts about Liberals and ordinance supporters, even though we are never told that any city council members are Liberals in the first place. The premises leave open the possibility that all city council members are non-Liberals, so the conclusion doesn’t follow.