Logical ReasoningDifficulty: Medium

PT133 S3 Q19 Explanation

Professor: One cannot frame

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

TopicsMethod

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Stimulus

Professor: One cannot frame an accurate conception of one's physical environment on the basis of a single momentary perception, since each such glimpse occurs from only one particular perspective. Similarly, any history book gives only a distorted the biases and prejudices of its author.

What this question is testing

Method

Your task

Describe how the argument proceeds — the technique it uses to reach its conclusion.

Common trap

Answers that describe a method the argument doesn't actually use.

Winning move

Track the role each statement plays, then match that to the choice describing the same moves.

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 professor's argument proceeds

Answer choices

  1. Not Flawed / Incorrect16% picked this

    attempting to show that one piece of reasoning is incorrect by comparing it with another, presumably

    The is answer would work if it flipped its frown upside down. It's fair to say this argument "attempts to show that one piece of reasoning (about history) is correct by comparing it with another, presumably sound, piece of reasoning (about one's physical environment)".

  2. No Absurd Implications0% picked this

    developing a case for one particular conclusion by arguing that if that conclusion were false,

    There's no part of this argument where the author says, "After all, if a single history book didn't give a distorted view, then that would lead to X, Y, and Z, which is surely absurd". Showing the implications of logic is a very common correct answer on Method, but it doesn't match this argument at all.

  3. Correct72% picked this

    making a case for the conclusion of one argument by showing that argument's resemblance to

    Why this is right

    Here is the fixed version of (A). The author makes the case for "each history book offers an incomplete view" by showing that "a single momentary perception offers an incomplete view". When authors rely on an analogy, they are presuming that the analogy has merit and relevance, so it's fair to say that our author assumes that the analogous argument she's leaning on is a cogent (i.e. reasonable) one.

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

  4. Bad Premise Match2% picked this

    arguing that because something has a certain group of characteristics, it must also have another,

    The "certain group of characteristics" is the hardest thing to match, so if it feels weird enough to reject this, that's good enough reason to eliminate it. If we were trying to match it up, we'd start with the conclusion, which is saying that "a single history book always offers a distorted view". According to this answer choice's language, "something = a single history book" and "closely, related characteristic = offers a distorted view". That would mean that the premise should be saying that "something = a single history book" has a certain group of characteristics. But there's no premise that says that a single history book has a certain group of characteristics.

  5. Bad Conclusion Match9% picked this

    arguing that a type of human cognition is unreliable in one instance because it has been shown to

    The conclusion is about a single history book, not a type of human cognition. The analogy was about a type of human cognition (a single perception) being an unreliable gauge of a physical environment, but the conclusion about a history book offering only one perspective on history has nothing to do with a type of human cognition being unreliable.

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