Logical ReasoningDifficulty: Medium

PT110 S3 Q13 Explanation

Though many insects die soon

A free, expert breakdown of this official LSAT Logical Reasoning question.

TopicsMust be True

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Stimulus

Though many insects die soon after reproducing for the first time, some may live for years after the survival of the next generation has been secured. Among the latter are some of the ecosystem—for example, bees.

What this question is testing

Must be True

Your task

Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.

Common trap

Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.

Winning move

Predict what a right answer must do, then test each choice against the conclusion-evidence gap.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
13.

Which one of the following can be properly inferred from the

Answer choices

  1. Too Strong: most6% picked this

    Survival of the species, rather than of the individual, is the goal of

    This says "most insect populations have the goal of survival of the species, not of the individual". We can never infer anything about "most X's" unless we were given a fact that says "Most X's". The paragraph didn't give us any fact about "most insect populations".

  2. Overly Broad Comparison10% picked this

    Insects that do not play a vital role in the ecosystem are more likely to die after reproducing

    This is too sweeping of a generalization. It is comparing the group of all insects that don't play a vital role in the ecosystem (potentially millions of species) to the group of all insects that do play a vital role (again, potentially millions of species). And it's calculating the percentage of each group that dies after reproducing for the first time, and then saying the non-vital group has a higher percentage of "die after reproducing" than the vital group has. We don't have the data available to us to derive that sort of comparison. Many insects means something like "at least 5 insects". And Some means "at least 1".

  3. Too Strong: most Implies Another Answer5% picked this

    Most bees live well beyond the onset of the generation that

    This says "most bees live" for years after the survival of the next generation has been secured. We can never infer anything about "most X's" unless we were given a fact that says "Most X's". The paragraph didn't give us any fact about "most bees". We heard that some insects, including bees, may live for years after the survival of the next generation (well beyond the onset of the generation). But just because it's possible for bees to live for years after the onset of the next generation doesn't mean that most bees live that long. So if this answer were switched to "Some bees live well beyond the onset ..." we could totally pick it. We might also note that if (C) is true, then (D) is also true. We can never pick an answer that implies another answer.

  4. Correct78% picked this

    Those bees that reproduce do not always die soon after reproducing for

    Why this is right

    This is incredibly weak and thus provable wording. Saying that "A's do not always B" can be proven with just one data point of something that is A but was not B. Here, we would just need one bee that reproduces but doesn't die soon after reproducing for the first time. We knew that bees are an example of insects that may live for years after the survival of the next generation has been secured. So there is at least one bee that doesn't die soon after reproducing for the first time.

    Skill tested: Must be True · how this choice captures the argument's function is the move to repeat next time.

  5. Too Strong: most1% picked this

    Most insects are hatched self-sufficient and do not need to be cared for

    This says "most insects are hatched self-sufficient and don't need adult care". We can never infer anything about "most X's" unless we were given a fact that says "Most X's". The paragraph didn't give us any fact about "most insects". It's also a big leap to go from "an insect's parents die soon after reproducing" to "this insect is hatched self-sufficient and do not need to be cared for by adults". There might be insect populations where parents die after childbirth but childless aunts and uncles are still needed to care for the hatchlings.

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