Logical ReasoningDifficulty: Hard

PT149 S1 Q22 Explanation

Advertisement: Hypnosis videos work

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

TopicsFlaw

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Stimulus

Advertisement: Hypnosis videos work to alter behavior by subliminally directing the subconscious to act in certain ways. Directions to the subconscious must, however, be repeated many times in order to be effective. Hypnosis videos from Mesmosis, Inc. induce a hypnotic state and then issue an initial command to the subject’s subconscious to videos are extremely effective—it is as if they had actually been repeated 1,000 times!

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
22.

The advertisement’s reasoning is most vulnerable to criticism on the grounds that

Answer choices

  1. Correct53% picked this

    overlooks a requirement that it states for the effectiveness of directions

    Why this is right

    Normally, when Flaw answers begin with fails to consider / overlooks the possibility, we read them more or less like answer choices on Weaken: if true, could this hurt the argument? could I use this idea as an objection? In this case, could we use the stated requirement for effectiveness as an objection? Yes! This gets to the Self-Undermining flaw we were pointing out. The ad states that "if something isn't repeated many times, it's not effective". That rule basically ruins the way the videos supposedly work. Supposedly, the initial command to experience everything as though it's been said 1,000 times is why these videos work so well. But the initial command isn't repeated many times, so it won't be effective. People won't actually follow its instruction, so they won't experience each subsequent instruction as though it was said 1,000 times.

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

  2. Too Strong: always directly proportional23% picked this

    takes for granted that the effectiveness of a direction to the subconscious is always directly proportional to the number of

    When answers start with takes for granted / presumes / fails to establish, we're just asking ourselves, "DID the author actually make this assumption?" We can't accuse this argument of committing to the idea that effectiveness is always directly proportional to number of times. That's Volume Dial language (the more x, the more y). We were only told in absolute language "if not repeated many times, not effective". The author doesn't need to assume that 20,000 repetition are precisely two times as effective as 10,000 repetitions.

  3. Bad Conclusion Match4% picked this

    concludes that hypnosis is the most effective technique for altering behavior without considering evidence

    Does the author conclude that hypnosis is the most effective technique for altering behavior? Not at all. The conclusion is "the subsequent instructions on Mesmosis videos are extremely effective". This answer is borrowing language from the first sentence of the stimulus, which was just a background claim.

  4. Not Circular18% picked this

    draws a conclusion that simply restates a claim presented in support

    This describes the famous Circular Reasoning flaw, which is almost never the correct answer. Circular arguments are ones in which the evidence restates or assumes the truth of the conclusion. The conclusion here was that "the subsequent instructions on Mesmosis videos are extremely effective". Was there a premise that also said that? Definitely not.

  5. Trap2% picked this

    concludes that hypnosis videos will be effective simply because they have never been proven

    Bad Evidence Match Not Unproven vs. Proven False This alludes to the famous Unproven vs. Proven False flaw, but the evidence in this argument has nothing to do with saying "No one has ever proven that hypnosis videos are ineffective".

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