PrepTest 121
[lcid:3580] Prep Test 121 LSAT — Logical Reasoning — S1
Logical reasoning
Question prompt
Among a sample of
Remaining source text redacted.
Why the credited answer is right
Credited answer: D
The notes below walk through why it fits the stem and how to eliminate the rest.
Question Type
Must Be True Questions / Sufficient & Necessary Questions
Answer choices
-
AAll those with an Remaining source text redacted.
Why choice A is not credited
Incorrect. Having an Explorer's head means that the other side can't be a Judge's head or another Explorer's head, but that doesn't mean it has to be a building. While all Judge's heads have trees on the other side, that doesn't mean all trees have Judge's heads on the other side, so that Explorer's head could be opposite a tree. -
BAll those with a Remaining source text redacted.
Why choice B is not credited
Incorrect. This answer is a reversal of the conditional that closes out the stimulus. -
CNone of those with Remaining source text redacted.
Why choice C is not credited
Incorrect. Similar to the reasoning in (A) and (B), Judge's heads are all matched with trees, but trees could be matched with other icons—including the Explorer's head. -
DNone of those with Remaining source text redacted.
Why choice D matches the stem
Correct. Argument or Facts:
Facts
Question Type:
Must Be True
Stimulus Summary:
Coins from a country have 1 of 4 images on each side:
(1) Judge's head
(2) Explorer's head
(3) Building
(4) Tree
No coin has 2x Judge's head; 2x Explorer's head; 1x Judge's head 1x Explorer's headJudge's head → Tree on other side
Answer Anticipation:
It's hard to anticipate specifically what answer is going to show up, but it's going to rely on those last two rules—no double-headed coins; and all Judge's heads are opposite a tree. Let's head into the answers to see which one we can support based on this understanding.
Answer Explanation:
The stimulus establishes that every coin with a Judge's head has a tree on the other side. So if there's not a tree on the other side—if there's a building—then it can't have a Judge's head, as this answer choice states.
Key Takeaway:
If you're having trouble anticipating an answer in a Must Be True question, but you have a solid view of the stimulus, don't waste more time—head to the answers and work from there. -
ENone of those with Remaining source text redacted.
Why choice E is not credited
Incorrect. The Explorer's head can't have a head on the other side, but it isn't limited between the other icons, so it's possible that a building can be on the other side.
What this tests
Discussion
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"A" versus "C" 1 reply
Started by Gregory-Coffee
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diagramming 1 reply
Started by joaquin-acuna