Logical ReasoningDifficulty: Medium

PT138 S2 Q25 Explanation

If squirrels eat from a bird feeder

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

TopicsParallel Flaw

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Stimulus

If squirrels eat from a bird feeder, it will not attract many birds. However, squirrels eat from a bird feeder only if it lacks a protective cover. So a bird feeder will does not have a protective cover.

What this question is testing

Parallel Flaw

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
25.

The flawed pattern of reasoning in the argument above is most similar to that in which one of

Answer choices

  1. Bad Premise Match4% picked this

    If a tire's pressure is too low, the tire will wear out prematurely, and if a tire wears out prematurely, a likely cause is

    It looks like all three claims are conditionals, but the two premises don't have the same trigger, so we know it's wrong. These are the two premise triggers: Pressure too low → Tire wears out prematurely →

  2. Correct77% picked this

    If a tire's pressure is too low, the tire will wear out prematurely. But tire pressure will become too low only if the car

    Why this is right

    The two premises start with the same trigger: Pressure too low → wear out prematurely Pressure too low → neglects check And if we were to reverse that second premise, then we could derive the connection the author does in the conclusion: neglects → pressure → wear out check too low prematurely P1: B → A pressure too low → neglects check P2: B → C pressure too low → wear out prematurely C: A→ C neglects check → wear out prematurely

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

  3. Bad Premise / Conclusion Match4% picked this

    Tires wear out prematurely if car owners neglect to check the tire pressure regularly. Unless car owners are unaware of this fact, they check

    The conclusion is not really presenting as a conditional. It's a prescriptive / normative idea. "We should make car owners aware of consequences". Yes, we could turn that into a conditional, like, "If car owner, then should be made aware", but we shouldn't have to contort the correct answer that much. If we didn't bail based on that, we would potentially be enticed by the fact that the two premise conditionals do have similar triggers. neglect check regularly → wear our prematurely neglect check regularly → unaware of fact We would now want a conclusion that tries to make a conditional relationship between those outcomes, something like this: "If tires wear out prematurely, then the car owner was unaware" or "If car own is unaware, then tires will wear out prematurely" The conclusion doesn't resemble either of those. The fact that it doesn't mention "wear out prematurely" tells us it can't be a match.

  4. Bad Premise Match Valid Logic12% picked this

    If a tire's pressure is too low, the tire will wear out prematurely. But tire pressure will become too low if the car owner

    It looks like all three claims are conditionals, but the two premises don't have the same trigger, so we know it's wrong. These are the two premise triggers: Pressure too low → Neglects to check → If we got sucked into thinking harder about this answer, we would discover that it's also valid logic.

  5. Bad Premise Match3% picked this

    If a tire's pressure is too low, the tire will wear out prematurely. But it will also wear out prematurely if it is often

    It looks like all three claims are conditionals, but the two premises don't have the same trigger, so we know it's wrong. These are the two premise triggers: Pressure too low → Driven on gravel roads →

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