Logical ReasoningDifficulty: Hard

PT127 S1 Q15 Explanation

Some scientists have expressed reservations

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

TopicsPrinciple-Strengthen

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Stimulus

Some scientists have expressed reservations about quantum theory because of its counterintuitive consequences. But despite rigorous attempts to show that quantum theory’s predictions were inaccurate, they were shown to be accurate within the generally accepted statistical margin of error. These quantum theory’s competitors, warrant acceptance of quantum theory.

What this question is testing

Principle-Strengthen

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
15.

Which one of the following principles most helps to justify the

Answer choices

  1. Bad Trigger Match9% picked this

    A scientific theory should be accepted if it has fewer counterintuitive consequences than

    This rule's outcome matches our conclusion, so it's tempting to consider. If ... Then ... a theory's has fewer we should counterintuitive consequences accept that than competing theories do theory Does that trigger apply to Quantum Theory? Were we told that Quantum Theory has fewer counterintuitive consequences than its competitors? No, we were told the opposite! Quantum Theory is famous for having counterintuitive consequences! (we should have suspected a bad answer when we saw it was using "counterintuitive consequences", since that is from a Counterpoint, not from the Evidence)

  2. Correct71% picked this

    scientific theory should be accepted if it has been subjected to serious attempts to disprove it and has

    Why this is right

    This rule's outcome matches our conclusion, so it's tempting to consider. If ... Then ... a theory's has been subjected we should to serious attempts to disprove accept that and withstood all of them theory Does that trigger apply to Quantum Theory? Were we told that Quantum Theory has been subjected to serious attempts to disprove it? Yes, "despite rigorous attempts to show its predictions are inaccurate ..." Were we told that Quantum Theory has withstood all these attempts to disprove it? Yes, "quantum theory's predictions were shown to be accurate". The trigger applies to Quantum Theory, so the rule dictates that we should accept Quantum Theory, which matches our conclusion! (The part about "within the accepted margin of error" is meaningless science talk. If quantum theory predicted a velocity of 56.58892 m / sec and the measured velocity was 56.58893 m / sec, we say, okay that's close enough. You nailed it, Quantum Theory. Yes your prediction was 0.00001 m / sec off, but that's within the acceptable margin of error)

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

  3. Bad Conclusion Match12% picked this

    The consequences of a scientific theory should not be considered counterintuitive if the theory’s predictions have been

    This rule's outcome does not match our conclusion, so this is not tempting. If ... Then ... a theory's has the consequences of accurate predictions that theory shouldn't be called counterintuit. The trigger does apply to Quantum Theory, but this rule would allow us to conclude, "Thus, we shouldn't call QT's consequences counterintuitive", which is not the same as "Thus, we should accept QT."

  4. Bad Trigger Match Weak Outcome Match3% picked this

    A theory should not be rejected until it has been subjected to serious attempts

    This rule's outcome doesn't quite match our conclusion, so it's not very tempting. "Not rejecting" a theory is not the same as "accepting" a theory. There's a big middle ground of being agnostic about whether the theory is / isn't true. More importantly, the trigger is actually the opposite of what we know. If ... Then ... a theory's has not been we should subjected to serious attempts not reject than competing theories do theory That trigger does not apply to Quantum Theory, because QT has been subjected to serious attempts to disprove it.

  5. Reversed Logic6% picked this

    A theory should be accepted only if its predictions have not been

    This rule is putting our Conclusion into the trigger, which is always wrong. If ... Then ... we should accept its predictions have a theory not been disproved If these ideas went in the other order, this would be a usable correct answer.

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