PrepTest 154

[lcid:3713] Prep Test 154 LSAT — Logical Reasoning — S2 Logical reasoning

Question prompt

Library policy: For a 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

Strengthen with Sufficient Premise Questions

Answer choices

  1. A
    Paper Flowers is badly Remaining source text redacted.
    Why choice A is not credited
    Incorrect. Doesn't match the sufficient condition of any rule where the necessary condition is NOT Removed from Circulation.
  2. B
    Paper Flowers has been Remaining source text redacted.
    Why choice B matches the stem
    Correct. Argument or Facts:
    Argument

    Valid or Flawed:
    Flawed

    Question Type:
    Strengthen with Sufficient Premise

    Stimulus Summary:
    IF Book Removed from Circulation, THEN (Badly Damaged & Not Checked Out for > 2 Years). But IF (Book Written by Local Authors OR Significant to Local History) THEN (IF Book Removed from Circulation THEN Not Checked Out for > 3 Years.)

    Application: Paper Flowers ==> NOT Removed from Circulation

    Answer Anticipation:
    A few ways this could go, and they all require taking the contrapositive, since we're trying to justify a conclusion that ends with NOT Removed from Circulation. By taking the contrapositives of all the rules in the stimulus, we find out that:

    NOT Badly Damaged ==> NOT Removed from Circulation

    Checked Out In Last Two Years ==> NOT Removed from Circulation

    (Book Written by Local Authors OR Significant to Local History) AND Checked Out In Last Three Years ==> NOT Removed from Circulation

    If we determine that any of these sufficient conditions are true of Paper Flowers, then Paper Flowers should not be removed from circulation, proving the argument.

    Answer Explanation:
    Matches "Checked Out In Last Two Years," which always leads to "NOT Removed from Circulation." Bingo!

    Key Takeaway:
    Always take the contrapositive in any diagrammable Sufficient Assumption question, but it's especially important when the necessary condition of the conclusion is a negated version of the sufficient condition of one of the premises.
  3. C
    Paper Flowers was last Remaining source text redacted.
    Why choice C is not credited
    Incorrect. Irrelevant unless we know that Paper Flowers is By Local Authors or Significant to Local History, which we don't know.
  4. D
    Paper Flowers was written Remaining source text redacted.
    Why choice D is not credited
    Incorrect. Doesn't match the sufficient condition of any rule where the necessary condition is NOT Removed from Circulation.
  5. E
    Paper Flowers was not Remaining source text redacted.
    Why choice E is not credited
    Incorrect. Doesn't match the sufficient condition of any rule where the necessary condition is NOT Removed from Circulation.

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