LSAT 106 – Section 2 – Question 07

LSAT 106 - Section 2 - Question 07

June 1999

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Question QuickView	Type	Tags	Answer Choices	Curve	Question Difficulty	Psg/Game/S Difficulty	Explanation
PT106 S2 Q07	+LR +Exp	Evaluate +Eval Net Effect +NetEff Math +Math	A 2% 153 B 0% 130 C 1% 152 D 0% 162 E 96% 165	128 136 144	+Easier	147.566 +SubsectionMedium

For every 50 dogs that contract a certain disease, one will die from it. A vaccine exists that is virtually 100 percent effective in preventing this disease. Since the risk of death from complications of vaccination is one death per 5,000 vaccinations, it is therefore safer for a dog to receive the vaccine than not to receive it.

Summarize Argument: Phenomenon-Hypothesis

The author hypothesizes that it’s safer for dogs to get the vaccine than to skip it. She explains that the vaccine is almost 100% effective at preventing the disease, and the risk of death from the vaccine is 1 in 5,000. She also notes that 1 in 50 dogs who get the disease die.

Notable Assumptions

For the author’s argument to hold, she must assume that the disease is fairly common. While 1 in 5,000 vaccinated dogs die, and 1 in 50 dogs who get the disease die, we don’t know how many dogs will actually contract the disease in the first place.
She also assumes her argument applies to all dogs, without considering how the disease or the vaccine might affect different breeds or dogs differently.
She also assumes that there aren’t any other unaddressed consequences or risks of getting the vaccine or benefits of not getting the vaccine.

the total number of dogs that die each year from all causes taken together

Irrelevant— the author only addresses deaths from this particular disease and vaccination. The number of dogs that die each year from everything else is not relevant to her argument.

whether the vaccine is effective against the disease in household pets other than dogs

Irrelevant— the author is only discussing the effectiveness of the vaccine among dogs. How other animals might be affected by the disease or the vaccine doesn’t matter here.

the number of dogs that die each year from diseases other than the disease in question

Irrelevant— the author is only concerned with the number of dogs that die each year from the particular disease in question. She doesn’t address the dangers or mortality rates of any other diseases.

the likelihood that a dog will contract another disease such as rabies

Irrelevant— like (C), the author’s argument only addresses the disease in question. It doesn’t matter how likely a dog might be to contract some other kind of disease.

the likelihood that an unvaccinated dog will contract the disease in question

If the likelihood of catching the disease is very high, getting the vaccine may indeed be safer, since the risk of death from the vaccine is much lower than from the disease. However, if the likelihood is very low, the dog might be safer without the added risk of vaccination.

LSAT 106 – Section 2 – Question 07

LSAT 106 - Section 2 - Question 07

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LSAT PrepTest 106 Explanations

Section 1 - Logical Reasoning

Section 2 - Logical Reasoning

Section 3 - Logical Reasoning

Section 4 - Reading Comprehension

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