LSAT 101 – Section 2 – Question 11

LSAT 101 - Section 2 - Question 11

December 1997

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Question
QuickView		 Type Tags Answer
Choices		 Curve Question
Difficulty		 Psg/Game/S
Difficulty		 Explanation
PT101 S2 Q11
+LR
Must be true +MBT
Conditional Reasoning +CondR
Quantifier +Quant
A
3%
159
B
1%
163
C
10%
163
D
2%
161
E
84%
168
132
146
159
 +Medium 150.088 +SubsectionMedium

Not surprisingly, there are no professors under the age of eighteen. And, as is well known, no one under eighteen can vote legally. Finally, some brilliant people are professors, some are legal voters, and some are under eighteen.

Summary
The stimulus can be diagrammed as follows:
101.2.11-sum

Notable Valid Inferences
Some brilliant people are not professors.
Some brilliant people cannot legally vote.

A
No professors are eighteen-year-olds.
Could be false. Some professors could be eighteen-year-olds. We can infer that no professors are under eighteen, but this leaves room for the possibility that some professors are exactly eighteen.
B
All brilliant people are either professors, legal voters, or under eighteen.
Could be false. We know that some brilliant people are professors, legal voters, and/or under eighteen. But this may not be an exhaustive list. There could be brilliant people out there who are none of these three things.
C
Some legal voters are not professors.
Could be false. It’s possible that all legal voters are professors. The only things we can say for sure about legal voters are that some of them are brilliant people, and none of them are under eighteen.
D
Some professors are neither legal voters nor brilliant people.
Could be false. It’s possible that all professors are either legal voters or brilliant people, or both. The only things we can say for sure about professors are that at least some of them are brilliant people, and none of them are under eighteen.
E
Some brilliant people are neither professors nor legal voters.
We can combine the fact that some brilliant people are under eighteen with the facts that anyone who is under eighteen is not a professor and cannot legally vote.
101.2.11-inf

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LSAT PrepTest 101 Explanations

Section 1 - Reading Comprehension

Section 2 - Logical Reasoning

Section 3 - Logical Reasoning

Section 4 - Reading Comprehension

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