PrepTest 127
[lcid:3605] Prep Test 127 LSAT — Logical Reasoning — S2
Logical reasoning
Question prompt
Rifka: We do not
Remaining source text redacted.
Why the credited answer is right
Credited answer: B
The notes below walk through why it fits the stem and how to eliminate the rest.
Question Type
Methods of Reasoning Questions
Answer choices
-
Acontradict the conclusion of Remaining source text redacted.
Why choice A is not credited
Incorrect. Craig does contradict Rifka's conclusion, but he does provide a reason to reject one of her implicit premises (a fancy way of referring to an assumption)—he states that they are lost. -
Bdeny one of Rifka's Remaining source text redacted.
Why choice B matches the stem
Correct. Argument or Facts:
Argument/Argument
Valid or Flawed:
Flawed/Flawed
Question Type:
Methods of Reasoning
Stimulus Summary:
R: not Lost → not Stop and ask for directions. Therefore, not Stop and ask for directions.
C: We are lost, therefore we need to stop.
Answer Anticipation:
The argument asks how Craig responds to Rifka, so we need to understand both of their arguments.
Rifka establishes a conditional rule (not Lost → not Stop), and then she concludes the necessary condition. However, she never actually states that they're not lost, so that's an assumption of her argument.
Craig, however, does explicitly state that they are lost. So he denies Rifka's assumption in order to reach a separate conclusion.
Answer Explanation:
Craig denies one of Rifka's implicit premises (that they're lost) and then reaches the opposite conclusion. This answer describes Craig's rebuttal, so it's the correct answer.
Key Takeaway:
In Methods of Reasoning questions featuring two speakers, you should get in the habit of seeing if the two speakers use the same or different premises/assumptions to reach the same or different conclusion. Having that baseline can be helpful in finding the correct answer—and sometimes it'll be enough to find the answer by itself! -
Cimply that Rifka's argument Remaining source text redacted.
Why choice C is not credited
Incorrect. While Craig does reject Rifka's conclusion, he doesn't accept its premise (that conditional rule) or the implicit premise/assumption. -
Dprovide a counterexample to Remaining source text redacted.
Why choice D is not credited
Incorrect. Rifka does present a principle/generalization, but she applies it to Craig and her specific case, so her argument isn't just a generalization. Craig's rebuttal also isn't a counterexample—he's talking about the same situation, they just have different takes on whether they're lost! -
Eaffirm the truth of Remaining source text redacted.
Why choice E is not credited
Incorrect. Craig explicitly contradicts Rifka's conclusion, and he doesn't explicitly affirm the truth of her conditional premise.