LSAT 147 – Section 1 – Question 21
LSAT 147 - Section 1 - Question 21
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Question QuickView |
Type | Tags | Answer Choices |
Curve | Question Difficulty |
Psg/Game/S Difficulty |
Explanation |
---|---|---|---|---|---|---|---|
PT147 S1 Q21 |
+LR
| Weaken +Weak Causal Reasoning +CausR | A
15%
156
B
3%
154
C
7%
157
D
8%
159
E
67%
164
|
148 156 163 |
+Harder | 147.09 +SubsectionMedium |
Summarize Argument: Phenomenon-Hypothesis
The author concludes that Alzheimer’s risk can be reduced by converting homocysteine into other substances. This is based on the fact that people with above-average levels of homocysteine have higher risk of being diagnosed with Alzheimer’s.
Notable Assumptions
The author assumes that there’s no other explanation for the correlation between above-average homocysteine levels and increased risk of Alzheimer’s.
A
Many Alzheimer’s patients have normal homocysteine levels.
A correlation between above-average homocysteine and Alzheimer’s allows for outliers. There can be Alzheimer’s patients with normal or even below-average homocysteine levels.
B
The substances into which homocysteine is converted can sometimes have harmful effects unrelated to Alzheimer’s disease.
If the effects are unrelated to Alzheimer’s, then they have no impact on the conclusion, which is focused only on whether Alzheimer’s can be reduced by converting homocysteine to those substances.
C
B vitamins and folic acid are not metabolized by the body very efficiently when taken in the form of vitamin-mineral supplements.
This just suggests B vitamins and folic acid should be taken in other forms besides vitamin-mineral supplements. The author never suggested any specific form in which we take B vitamins and folic acid.
D
People whose relatives contracted Alzheimer’s disease are much more likely to develop Alzheimer’s than those whose relatives did not.
This suggests that there’s also a genetic component to Alzheimer’s. But there could be a genetic component to having higher homocysteine levels. In addition, it’s possible for there to be multiple, independent causes of Alzheimer’s.
E
Alzheimer’s disease tends to increase the levels of homocysteine in the blood.
This provides an alternate explanation for the correlation observed. If Alzheimer’s increases homocysteine, we’d expect people with Alzheimer’s to have higher levels of homocysteine, even if homocysteine doesn’t cause Alzheimer’s.
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LSAT PrepTest 147 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
- Question 26
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 - 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
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