LSAT Explanation PT 43, S3, Q21: Each of the many people who

LSAT Question Stem

If the statements above are true, which one of the following must be true? 

Logical Reasoning Question Type

This is a Must Be True question. 

Correct Answer

The correct answer to this question is B. 

LSAT Question Complete Explanation

This is a Must Be True (MBT) question, which means that we need to find the answer choice that must be true based on the information provided in the passage.

Let's first break down the passage:

1. Each participant in the town's annual spring cleanup received a community recognition certificate (CRC).

2. The spring cleanup took place at the same time as the downtown arts fair.

3. There are at least some spring cleanup participants who are not active in the town's artistic circles (TAC).

We can represent this information using formal logic:

1. Spring Cleanup (SC) -> Community Recognition Certificate (CRC)

2. Spring Cleanup (SC) TAC

Now let's analyze each answer choice:

a) Some of the persons who are active in the town's artistic circles received community recognition certificates.

- We cannot conclude this from the passage. The passage only tells us that some spring cleanup participants are not active in TAC, but it doesn't say anything about whether some TAC members received CRCs.

b) Not all of those who received community recognition certificates are active in the town's artistic circles.

- This statement must be true based on the passage. Since some spring cleanup participants are not active in TAC, and all spring cleanup participants received CRCs, it follows that not all CRC recipients are active in TAC.

c) No participants in the downtown arts fair received community recognition certificates.

- The passage doesn't provide enough information to conclude this. It's possible that some arts fair participants also received CRCs, perhaps for participating in both events or for other reasons.

d) No person who received a community recognition certificate has not participated in the spring cleanup.

- This statement is a mistaken reversal of the first sentence. The passage tells us that all spring cleanup participants received CRCs, but it doesn't say that only spring cleanup participants received CRCs.

e) Persons who are active in the town's artistic circles are not concerned with the town's environment.

- This statement is beyond the scope of the passage. We cannot conclude anything about the environmental concerns of those active in TAC.

Based on our analysis, the correct answer choice is (B) - Not all of those who received community recognition certificates are active in the town's artistic circles.