Logical reasoning PrepTest 110 · Section 3 · Question 13

Incorrect. The "goal" of different species is out of scope—their motives aren't made clear. Just because some facts we have are tied to reproduction doesn't mean that we can infer anything about their goals to survive.

Incorrect. There's no way to conclude that one group of insects is "more likely" to do anything than another based on these statements since all of the terms are weak quantifiers that don't allow such a comparison to be drawn.

Incorrect. It's unclear from the stimulus if, when it says "Among the latter some "insects," it's referring to the entire species at a time, or individual members of the species. It's quite possible that only some bees live after the next generation's survival has been secured.

Correct. Argument or Facts:
Facts

Question Type:
Must Be True

Stimulus Summary:
Insects —some Die soon after first reproducing
Insects —some Live for years after reproducing
Insects that live for years after reproducing —some Work to benefit the ecosystem (e.g., bees)

Answer Anticipation:
If you didn't represent these statements using our quantified notation, that's fine. The important thing here is that you recognized all of these statements are weak—they're all some statements. As such, we can't draw any inferences by combining them, and thus the correct answer will need to be derived from a single one of the statements. Since the last statement brings in a specific example, there's a good chance that we'll get a paraphrase of the last answer with bees replacing the generic insects so let's look for that answer while staying flexible on other potential answers.

Answer Explanation:
This answer essentially replaces the generic insects in the last statement with the specific example provided. The latter insects are the ones that live long after the next generation has been secured, and this includes bees, so this answer is supported.

Key Takeaway:
While logical force/quantifiers are key to almost all questions on the LSAT, they're particularly important in Must Be True questions. The weaker the statements in the stimulus, the weaker the correct answer will be. And if the statements are so weak that there's no guaranteed overlap between them, the correct answer will likely reflect a single statement.

Incorrect. While it might be supported that the insects whose parents die soon after reproducing are self—sufficient (since their parents have died), that only applies to "many" insects not "most."