LSAT 116 – Section 3 – Question 09

LSAT 116 - Section 3 - Question 09

June 2004

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Question
QuickView		 Type Tags Answer
Choices		 Curve Question
Difficulty		 Psg/Game/S
Difficulty		 Explanation
PT116 S3 Q09
+LR
Must be true +MBT
Conditional Reasoning +CondR
Quantifier +Quant
A
74%
165
B
2%
152
C
10%
158
D
11%
159
E
3%
156
140
151
163
 +Medium 146.244 +SubsectionMedium

Most lecturers who are effective teachers are eccentric, but some noneccentric lecturers are very effective teachers. In addition, every effective teacher is a good communicator.

Summary
Some noneccentric lecturers are very effective teachers, but most lecturers who are effective teachers are eccentric. Every effective teacher is a good communicator.

Notable Valid Inferences
Some good communicators are eccentric.

A
Some good communicators are eccentric.
Must be true. As shown below, we can combine the conditional claims that most lecturers who are effective teachers are eccentric and that every effective teacher is a good communicator. There must be some overlap between good communicators and eccentric people.
B
All good communicators are effective teachers.
Could be false. This answer choice confuses sufficiency for necessity. We know that all effective teachers are good communicators, but we don’t necessarily know if all good communicators are effective teachers.
C
Some lecturers who are not effective teachers are not eccentric.
Could be false. As shown in our diagram, our conditions are limited to lecturers who are effective teachers. Lecturers who are not effective teachers are outside of the scope of our conditions.
D
Most lecturers who are good communicators are eccentric.
Could be false. As shown on our diagram, the only “most” relationship we have is that most lecturers who are effective teachers are eccentric. We cannot infer any other “most” relationships, we can only infer “some” relationships.
E
Some noneccentric lecturers are effective teachers but are not good communicators.
Must be false. We know that every effective teacher is a good communicator. It is impossible to infer that some effective teachers are not good communicators from our conditions.

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LSAT PrepTest 116 Explanations

Section 1 - Reading Comprehension

Section 2 - Logical Reasoning

Section 3 - Logical Reasoning

Section 4 - Reading Comprehension

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