Logical ReasoningDifficulty: Easy

PT142 S1 Q4 Explanation

Scientist: Rattlesnakes prey on young

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

TopicsStrengthen

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Stimulus

Scientist: Rattlesnakes prey on young California ground squirrels. Protective adult squirrels harass a threatening rattlesnake by puffing up their tails and wagging them. New results show that the squirrel's tail also heats up when harassing a rattlesnake. Since rattlesnakes have an infrared sensing organ that squirrel's tail probably plays a role in repelling rattlesnakes.

What this question is testing

Strengthen

Your task

Find the choice that makes the argument's conclusion more likely to be true.

Common trap

Answers that are consistent with the argument but add no real support, or that strengthen a claim the argument doesn't make.

Winning move

Locate the gap between evidence and conclusion, then pick the choice that closes it.

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

The question
4.

Which one of the following, if true, most helps to support the

Answer choices

  1. Irrelevant Quality1% picked this

    Rattlesnakes do not have the ability to increase the temperature of

    We're trying to assess whether rattlesnakes are repelled by a squirrel tail's heat, not whether rattlesnakes are capable of heating their own tail.

  2. No Impact1% picked this

    Squirrels puff up their tails and wag them when they attempt to attract the attention

    This discusses another instance in which squirrels puff their tails, which is irrelevant to the instance we're analyzing. We're trying to figure out why snakes are repelled by the puffed tail, and this answer has nothing to do with that.

  3. Correct95% picked this

    Rattlesnakes react much more defensively when confronted with a squirrel whose tail is heated up than when confronted with

    Why this is right

    This choice effectively uses a "no cause, no effect" scenario: rattlesnakes react more defensively to a hot tail than a non-hot tail. It supports the hypothesis by illustrating that the heat is a crucial factor in repelling rattlesnakes, thus strengthening the argument.

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

  4. No Impact2% picked this

    The rattlesnake is not the only predator of the California ground squirrel that causes it to engage in harassing

    This choice mentions that squirrels shake their tails at other predators, which doesn't do anything to strengthen the hypothesis about rattlesnakes being repelled by the heat.

  5. No Impact1% picked this

    Mammals such as the California ground squirrel have no organ for

    The hypothesis involves the snakes having an infrared sense, so that they can register the heat of the squirrel's tail and be bugged out. But we don't care whether squirrels have an infrared sense.

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