Logical ReasoningDifficulty: Medium

PT101 S3 Q4 Explanation

P’s argument is vulnerable to which

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

TopicsFlaw

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Stimulus

M: The Greek alphabet must have been invented by some individual who knew the Phoenician writing system and who wanted to have some way of recording Homeric epics and highly developed tradition of oral poetry.

P: Your hypothesis is laughable! What would have been the point of such a person’s writing Homeric epics down? Surely a person who knew them well enough to write them down would not need to could read them, according to your hypothesis.

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
4.

P’s argument is vulnerable to which one of the

Answer choices

  1. Not Necessary4% picked this

    It fails to demonstrate that the Phoenician alphabet alone could have provided the basis for

    Whenever we see Flaw answer choices start with takes for granted / presumes / fails to establish / fails to demonstrate they are presenting an idea that supposedly is something the author needed to assume but never established. Did P need to assume that "the Phoenician alphabet alone could have provided the basis for the Greek alphabet"? Not at all. First of all, that's a very extreme idea (the Phoenician alphabet alone could do it). More importantly, P is shooting down the hypothesis that the Greek alphabet was invented by someone who knew the Phoenician writing system. So P doesn't need to assume anything that would help that hypothesis be true.

  2. Too Strong: first text ever Opposite2% picked this

    It incorrectly assumes that the first text ever written in Greek was

    This question is about P's argument. Was P assuming that "the first text ever written in Greek was a Homeric poem"? No, the opposite. P is saying that this hypothesis is laughable.

  3. Out of Scope14% picked this

    It confuses the requirements for a complex oral tradition with the requirements of

    Out of Scope: requirements of oral/written Neither person identifies anything that's required of a complex oral tradition or of a written language.

  4. Bad Conclusion / Evidence Match Opposite3% picked this

    It attempts to demonstrate the truth of a hypothesis merely by showing that

    Does P's argument attempt to demonstrate the truth of a hypothesis? The opposite. P is arguing that a hypothesis is laughably untrue.

  5. Correct77% picked this

    It overlooks the possibility that the person who invented the Greek alphabet did so with the intention of

    Why this is right

    Whenever a Flaw answer choice begins with fails to consider / overlooks the possibility the answer is presenting a supposed Objection. Would it hurt P's argument to say, "maybe the person who invented the Greek alphabet was planning to teach it to others"? Sure! P was saying, "Why would you bother writing down a poem you already know in a language that only you know?" This answer choice is responding, "Because ... I was planning to then teach my new language to people. Then they could read the copy of Homer's epics that I wrote down in my new language".

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

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