Logical ReasoningDifficulty: Medium

PT102 S2 Q19 Explanation

In all mammalian species, the period

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

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Stimulus

In all mammalian species, the period of a young mammal’s life in which it is most frequently playful coincides with the period of most rapid growth of the neural connections in the mammal’s brain that give rise to various complex patterns of movement, posture, and social response. Indeed, the neural connections indispensable for the mammal’s survival and well-being as an adult.

What this question is testing

Most Supported

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
19.

The statements above, if true, serve LEAST well as evidence for which one

Answer choices

  1. Consistent9% picked this

    Young mammals of species that are preyed on by other animals are likely to engage in forms of sudden mock flight, bolting away from

    Given the connection between play and survival as an adult, it makes sense that a species that depends on running away from predators as an adult would have forms of play that rehearse that action, even when no predators are actually around.

  2. Correct74% picked this

    The young of nonmammalian species such as fish, reptiles, and birds do not normally engage in playful behavior that serves the function served by

    Why this is right

    We aren't told anything about non-mammalian species. This answer doesn't conflict with anything we read (it's not a soft version of Must Be False), it's just not supported by anything we read. People who did think it was supported by this paragraph would be committing the flaw of thinking, "the only thing they talked about is the only thing for which this is true".

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

  3. Consistent10% picked this

    Adult mammals are more likely to engage in interactive play with their young if they engaged in similar forms of play

    Given the connection between play and survival as an adult, it makes some sense that adults who played as a child and have potentially seen the utility of those skills as an adult would be inclined to play with their children. Given the connection between play and neural development, it also might make some sense to think of propensity to play as a genetic trait that would have a hereditary continuity from adult to child.

  4. Supported4% picked this

    Mammals that cannot engage in certain common forms of play when young are likely to show certain deficits that limit

    This one is most clearly supported by the paragraph, since we were told in conditional form that without this play, we wouldn't have the neural connections, and without those we wouldn't have survival and well-being.

  5. Consistent, Same as (A)2% picked this

    Young mammals of predatory species tend to practice in their play inoffensive versions of motions and actions that are useful in finding and catching

    This has the same logical relationship as choice (A). Since play is connected to adult survival and well-being, adults who needs to hunt and kill in order to succeed as an adult would rehears less-harmful versions of those actions in their play.

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