LSAT 124 – Section 1 – Question 03

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PT124 S1 Q03
+LR
Weaken +Weak
A
1%
154
B
97%
164
C
1%
156
D
0%
156
E
1%
154
121
131
140
+Easiest 146.495 +SubsectionMedium

Science columnist: It is clear why humans have so many diseases in common with cats. Many human diseases are genetically based, and cats are genetically closer to humans than are any other mammals except nonhuman primates. Each of the genes identified so far in cats has an exact counterpart in humans.

Summarize Argument
The author concludes that it’s clear why humans share diseases with cats. Many diseases are genetically based, and cats and humans are relatively close genetic relatives.

Notable Assumptions
In order for the reason why humans and cats share so many diseases to be “clear,” the author must assume that the diseases humans and cats share are genetically based diseases. The author must also assume that humans and cats, by virtue of having exact gene counterparts, are susceptible to the exact same diseases.

A
Cats have built up resistance to many of the diseases they have in common with humans.
We don’t care how resistant cats are. We care why they share these diseases with humans in the first place.
B
Most diseases that humans have in common with cats have no genetic basis.
If the diseases humans and cats share aren’t genetic, then the author’s conclusion—that it’s clear why humans and cats share so many diseases—doesn’t follow. The author’s entire argument is predicated on the idea these diseases are genetic.
C
Cats have more diseases in common with nonhuman primates than with humans.
Even if this were true, humans and cats still share many diseases. We need to weaken the author’s argument—that these diseases are clearly shared due to genetics.
D
Many of the diseases humans have in common with cats are mild and are rarely diagnosed.
Even if these diseases are mild, humans still share them with cats. We need to weaken the author’s argument that this is clearly for genetic reasons.
E
Humans have more genes in common with nonhuman primates than with cats.
This is stated in the stimulus.

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