The Iliad and the Odyssey were both attributed to Homer in ancient times. But these two poems differ greatly in tone and vocabulary and in certain details of the fictional world they depict. So they are almost certainly not the work of the same poet.

Summarize Argument

The author concludes that the Iliad and the Odyssey were almost certainly not written by the same poet. She bases this on the fact that the two poems differ greatly in tone and vocabulary and in their depictions of the fictional world.

Notable Assumptions

The author assumes that, just because two works differ greatly in tone, vocabulary, and other details, they were almost certainly not written by the same person. This means the author assumes that the same writer cannot or would not write two works that differ greatly in these respects.

A
Several hymns that were also attributed to Homer in ancient times differ more from the Iliad in the respects mentioned than does the Odyssey.

We don’t know if Homer actually wrote these hymns that were attributed to him. So, (A) doesn’t tell us anything about whether the same writer could or would write separate works that differ in tone, vocabulary, and other details.

B
Both the Iliad and the Odyssey have come down to us in manuscripts that have suffered from minor copying errors and other textual corruptions.

Just because the Iliad and the Odyssey have suffered from “minor copying errors” doesn’t change the fact that the two poems differ greatly in tone, vocabulary, and other details. So the question of whether they might have been written by the same author remains.

C
Works known to have been written by the same modern writer are as different from each other in the respects mentioned as are the Iliad and the Odyssey.

By presenting works by the same modern writer that differ greatly in tone, vocabulary, and other details, (C) proves that the author’s assumption (that two works that differ in these respects can’t be by the same writer) cannot be true. So, the author’s conclusion doesn’t follow.

D
Neither the Iliad nor the Odyssey taken by itself is completely consistent in all of the respects mentioned.

The fact that parts of a work vary in these ways doesn't answer the question of authorship. Perhaps, for example, the work had multiple authors. We need an answer that addresses the assumption that works with such differences can't have been written by the same person.

E
Both the Iliad and the Odyssey were the result of an extended process of oral composition in which many poets were involved.

By suggesting that many poets contributed to the poems, (E) further argues against the idea that the Iliad and Odyssey were written by a single author. So it doesn't weaken the author's conclusion.


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At 1:27, J.Y. meant to say “ if M if before F ” (not “if M if before H”).


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Certain companies require their managers to rank workers in the groups they supervise from best to worst, giving each worker a unique ranking based on job performance. The top 10 percent of the workers in each group are rewarded and the bottom 10 percent are penalized or fired. But this system is unfair to workers. Good workers could receive low rankings merely because they belong to groups of exceptionally good workers. Furthermore, managers often give the highest rankings to workers who share the manager’s interests outside of work.

Summarize Argument
A ranking system that evaluates workers based on their performance relative to a group of workers is unfair. It penalizes workers in strong groups by judging them against the company’s top performers instead of all its employees. Additionally, the system relies on managers’ subjective judgments, leading to biased ratings based on managers’ favorites rather than the workers’ actual performance.

Identify Conclusion
A system that ranks workers based on their performance relative to their work group “is unfair to workers.”

A
Some companies require their managers to give unique rankings to the workers they supervise.
This sentence provides context by setting the stage for the argument in the stimulus. It introduces the idea of ranking workers, a practice some companies use, which the stimulus ultimately argues against.
B
Under the ranking system, the top 10 percent of the workers in each group are rewarded and the bottom 10 percent are penalized or fired.
This sentence provides context by explaining how the ranking system works. This explanation offers the background needed to understand the author’s argument that the ranking system is unfair to workers.
C
The ranking system is not a fair way to determine penalties or rewards for workers.
This answer choice accurately summarizes the argument’s main conclusion. The stimulus states that the ranking system is “not a fair way to determine” workers’ rewards and penalties, which directly restates the conclusion that the system is “unfair to workers.”
D
Workers in exceptionally strong work groups are unfairly penalized under the ranking system.
This states the argument’s first premise. The stimulus argues that the ranking system is unfair because it judges some workers more harshly than others. For instance, workers in a strong group are held to a higher standard than those compared to a group of weaker performers.
E
Managers often give the highest rankings to workers who share the manager’s outside interests.
This answer addresses the argument’s second premise. The stimulus argues that the ranking system is unfair because it is subjective, allowing managers to favor employees who share their interests instead of evaluating based on relevant criteria like work ethic or contribution.

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Psychologist: A study of 436 university students found that those who took short naps throughout the day suffered from insomnia more frequently than those who did not. Moreover, people who work on commercial fishing vessels often have irregular sleep patterns that include frequent napping, and they also suffer from insomnia. So it is very likely that napping tends to cause insomnia.

Summarize Argument: Phenomenon-Hypothesis
The psychologist concludes that napping tends to cause insomnia. This is based on the observation that, on commercial fishing vessels and in a study of university students, people who nap often tend to suffer from insomnia more often.

Identify and Describe Flaw
The psychologist observes a correlation between frequent napping and insomnia, and concludes that napping causes insomnia. This conclusion is flawed because it overlooks the alternative explanation that insomnia (and the resulting sleep deprivation) causes people to take naps more often.

A
presumes, without providing justification, that university students suffer from insomnia more frequently than do members of the general population
The psychologist doesn’t presume that university students suffer from insomnia more often than members of the general public.
B
presumes that all instances of insomnia have the same cause
The psychologist doesn’t claim that all instances of insomnia have the same cause, just that napping is one cause of insomnia.
C
fails to provide a scientifically respectable definition for the term “napping”
It’s not needed for the psychologist to define the term “napping”; the term clearly refers to short periods of sleeping during the day.
D
fails to consider the possibility that frequent daytime napping is an effect rather than a cause of insomnia
The psychologist’s argument only considers one possible causal relationship between insomnia and napping—that napping causes insomnia. This fails to consider the alternative causality that insomnia leads to more frequent napping.
E
presumes, without providing justification, that there is such a thing as a regular sleep pattern for someone working on a commercial fishing vessel
Whether or not commercial fishers can ever have regular sleep patterns is irrelevant to their role in the argument. What’s important is just that commercial fishers also display a correlation between napping and insomnia.

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