Logical ReasoningDifficulty: Hard

PT120 S4 Q14 Explanation

Franklin: The only clue I

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

TopicsFlaw

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Stimulus

Franklin: The only clue I have as to the identity of the practical joker is the handwriting on the note. Ordinarily I would suspect Miller, who has always been jealous of me, but the joker is apparently someone else.

What this question is testing

Flaw

Your task

Describe the reasoning error the argument actually commits.

Common trap

Answers that name a real logical flaw the argument doesn't actually make.

Winning move

Articulate the gap in the reasoning yourself, then match it to the choice that describes that 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
14.

Which one of the following provides the strongest grounds for criticizing

Answer choices

  1. Correct58% picked this

    It fails to consider the possibility that there was more than

    Why this is right

    This has always irked me as an answer, just because the singular vs. plural (the joker vs. multiple jokers) seems weirdly expressed. But when we see fails to consider / overlooks the possibility, we can ask ourselves "does the idea after that seem like a potential objection to the author's argument?" If we said, "Hey, author — what if there's more than one practical joker?", would that go against his thinking? Yes, it would, because that would allow Miller to still be involved. If she has a co-conspirator, then maybe THEY are the one who wrote the note (Miller knew her handwriting would be too obvious). We can think of this answer as purely saying, "the author failed to consider a different possible interpretation of what's going on. He's sure the joker is someone besides Miller, but it's possible that "the joker" is actually two people, Miller and her accomplice.

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

  2. Wouldn't Ever Be Correct11% picked this

    It fails to indicate the degree to which handwriting samples should look alike in order to be considered

    First of all, there aren't multiple handwriting samples being compared to each other, so this answer is addressing something out of scope. There's one handwriting sample (the joker's note), and there's Franklin's mental image of what he thinks Miller's handwriting looks like this. Secondly, we wouldn't fault an argument's logic for failing to specify a degree, unless the argument was already using numbers and the logic hinged on that degree. Whether we toss out one random degree, "Handwriting samples have to be 88% or better in terms of similarity in order to be considered from same source" vs. any other random degree "Handwriting samples have to be 96% or better to qualify as the same" it doesn't make a difference. We don't know to what degree the note differed from Franklin's mental picture of Miller's handwriting anyway, so an exact degree wouldn't tell us anything. Flaw answer choices never ask for specific measurements or dates or names or definitions.

  3. Contradicted1% picked this

    It provides no explanation for why Miller should be the

    It did provide some explanation for why Miller would be a suspect: "she has always been jealous of me". The author never identifies anyone as the prime suspect, but to the extent that we'd presume it's Miller, the author did provide some explanation why.

  4. Not an Objection1% picked this

    It provides no explanation for why only one piece of evidence

    Yes, it's true the author provided no explanation for why there's only one clue, but that's not the author's job. It's not his fault there's only one piece and so it's not his burden to explain why.

  5. Opposite Logic29% picked this

    It takes for granted that if the handwriting on the note had been Miller’s, then the identity of the joker would have

    The author's argument was like this: If .... Then ... the handwriting The joker isn't didn't match Miller's Miller This answer choice presents that logic in "illegal light switch" mode. If .... Then ... the handwriting had The joker was matched Miller's Miller

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