LSAT 109 – Section 4 – Question 25
LSAT 109 - Section 4 - Question 25
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Target time: 0:51
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| Question QuickView |
Type | Tags | Answer Choices |
Curve | Question Difficulty |
Psg/Game/S Difficulty |
Explanation |
|---|---|---|---|---|---|---|---|
| PT109 S4 Q25 |
+LR
+Exp
| Must be true +MBT Conditional Reasoning +CondR | A
90%
167
B
2%
161
C
1%
157
D
2%
156
E
5%
156
|
143 150 157 |
+Medium | 150.49 +SubsectionHarder |
J.Y.’s explanation
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Essayist: Every contract negotiator has been lied to by someone or other, and whoever lies to anyone is practicing deception. But, of course, anyone who has been lied to has also lied to someone or other.
Summary
The stimulus can be diagrammed as follows:
Notable Valid Inferences
Every contract negotiator has lied to someone, and therefore practiced deception. If a person has not practiced deception, they are not a contract negotiator.
A
Every contract negotiator has practiced deception.
This must be true. As shown below, by chaining the conditional claims, we see that all contract negotiators must have lied to someone and, in extension, have practiced deception.
B
Not everyone who practices deception is lying to someone.
This could be false. Practicing deception is not a sufficient condition for anything in our stimulus, which means there are no implications from knowing someone practices deception.
C
Not everyone who lies to someone is practicing deception.
This must be false. Whoever lies to anyone is practicing deception.
D
Whoever lies to a contract negotiator has been lied to by a contract negotiator.
This could be false. No information in the stimulus suggests that if someone lies to a contract negotiator they have been lied to by one in the past.
E
Whoever lies to anyone is lied to by someone.
This could be false. We know that anyone who has been lied to has lied to someone, but we don’t know if this conditional relationship goes both ways, as (E) suggests.
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LSAT PrepTest 109 Explanations
Section 1 - Logical Reasoning
- Question 01
- Question 02
- Question 03
- Question 04
- Question 05
- Question 06
- Question 07
- Question 08
- Question 09
- Question 10
- Question 11
- Question 12
- Question 13
- Question 14
- Question 15
- Question 16
- Question 17
- Question 18
- Question 19
- Question 20
- Question 21
- Question 22
- Question 23
- Question 24
- Question 25
Section 2 - Reading Comprehension
- Passage 1 – Passage
- Passage 1 – Questions
- Passage 2 – Passage
- Passage 2 – Questions
- Passage 3 – Passage
- Passage 3 – Questions
- Passage 4 – Passage
- Passage 4 – Questions
Section 3 - Logical Reasoning
- Question 01
- Question 02
- Question 03
- Question 04
- Question 05
- Question 06
- Question 07
- Question 08
- Question 09
- Question 10
- Question 11
- Question 12
- Question 13
- Question 14
- Question 15
- Question 16
- Question 17
- Question 18
- Question 19
- Question 20
- Question 21
- Question 22
- Question 23
- Question 24
- Question 25
Section 4 - Logical Reasoning
- Question 01
- Question 02
- Question 03
- Question 04
- Question 05
- Question 06
- Question 07
- Question 08
- Question 09
- Question 10
- Question 11
- Question 12
- Question 13
- Question 14
- Question 15
- Question 16
- Question 17
- Question 18
- Question 19
- Question 20
- Question 21
- Question 22
- Question 23
- Question 24
- Question 25
- Question 26
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