LSAT 139 – Section 1 – Question 21

LSAT 139 - Section 1 - Question 21

June 2013

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Target time: 1:32

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Question
QuickView		 Type Tags Answer
Choices		 Curve Question
Difficulty		 Psg/Game/S
Difficulty		 Explanation
PT139 S1 Q21
+LR
Must be true +MBT
Conditional Reasoning +CondR
Quantifier +Quant
A
41%
162
B
9%
159
C
48%
168
D
1%
158
E
1%
153
157
165
174
 +Hardest 142.273 +SubsectionEasier

Video of JY doing this

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Essayist: Winners of a Nobel prize for science, who are typically professional scientists, have all made significant contributions to science. But amateur scientists have also provided many significant contributions. And unlike professional scientists, who are often motivated by economic necessity or a desire for fame, amateur scientists are motivated by the love of discovery alone.

Summary

The stimulus can be diagrammed as follows:

Notable Valid Inferences

Some scientists who have provided significant contributions are motivated by the love of discovery alone.

Some professional scientists have provided significant contributions to science.

A
Some amateur scientists who did not win a Nobel prize for science nevertheless made significant contributions to science.

This could be false. We don’t know anything about the group of amateur scientists who have not won a Nobel prize for science.

B
Typically, winners of a Nobel prize for science are not motivated at all by the love of discovery.

This could be false. All we know about winners of a Nobel prize is that most of them are professional scientists and all of them have made significant contributions to science. We can’t make inferences about their motivations.

C
The love of discovery is the motive behind many significant contributions to science.

This must be true. As shown below, there is some overlap between the group of scientists who have made significant contributions and those who are motivated by the love of discovery. “Many” translates to “some.”

D
Professional scientists have made a greater overall contribution to science than have amateur scientists.

This could be false. We don’t have the information to compare the extent of overall contributions to science between professional and amateur scientists.

E
A professional scientist is more likely to make a significant contribution to science if he or she is motivated by the love of discovery.

This could be false. We don’t have any information that indicates how likely one is to make significant contributions to science depending on their motivations.

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LSAT PrepTest 139 Explanations

Section 1 - Logical Reasoning

Section 2 - Reading Comprehension

Section 3 - Reading Comprehension

Section 4 - Logical Reasoning

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