Okay so the stimulus is telling us about some psychological studies, where subjects were told to read something and that whatever it was they read caused them to develop some beliefs. Then, the researchers told them that the statements they had read were false. Counterintuitively most of the people who had formed these beliefs stuck with them, even after being told that the statements that led to them were false. This is the phenomenon that is seeking an explanation, and the journal proposes that this is because once humans acquire a belief they tend to hold on to that belief.

We have the weaken this argument, so we are really looking for another reason why these people might have stuck to their original belief that is not the result of some innate tendency to maintain ones beliefs.

Answer choice (A) really does not tell us anything. Whether the beliefs were correct or not is irrelevant to the point at issue. We are wondering why these people continued to believe they were correct even when told the opposite.

Answer choice (B) is really more an opinion than anything else. Who cares if it's unrealistic?

Answer choice (C) is similar, who cares if the statements were misleading. The participants formed beliefs, those beliefs were then challenged, and the participants maintained them nevertheless. Whether the original basis for those beliefs was actually misleading is irrelevant.

Answer choice (D) is the correct answer. If the subjects had acquired confirmation of the beliefs before being told the original statements were false, they would not need the original statements to maintain the belief. There would be another support structure for the beliefs that they developed and the original statements could fall away without a problem.

Answer choice (E) again is just totally irrelevant. Their skepticism does not actually matter because we are told that they did in fact form beliefs.


101 comments

Okay so the stimulus is telling us about some psychological studies, where subjects were told to read something and that whatever it was they read caused them to develop some beliefs. Then, the researchers told them that the statements they had read were false. Counterintuitively most of the people who had formed these beliefs stuck with them, even after being told that the statements that led to them were false. This is the phenomenon that is seeking an explanation, and the journal proposes that this is because once humans acquire a belief they tend to hold on to that belief.

We have the weaken this argument, so we are really looking for another reason why these people might have stuck to their original belief that is not the result of some innate tendency to maintain ones beliefs.

Answer choice (A) really does not tell us anything. Whether the beliefs were correct or not is irrelevant to the point at issue. We are wondering why these people continued to believe they were correct even when told the opposite.

Answer choice (B) is really more an opinion than anything else. Who cares if it's unrealistic?

Answer choice (C) is similar, who cares if the statements were misleading. The participants formed beliefs, those beliefs were then challenged, and the participants maintained them nevertheless. Whether the original basis for those beliefs was actually misleading is irrelevant.

Answer choice (D) is the correct answer. If the subjects had acquired confirmation of the beliefs before being told the original statements were false, they would not need the original statements to maintain the belief. There would be another support structure for the beliefs that they developed and the original statements could fall away without a problem.

Answer choice (E) again is just totally irrelevant. Their skepticism does not actually matter because we are told that they did in fact form beliefs.

Journal: In several psychological studies, subjects were given statements to read that caused them to form new beliefs. Later, the subjects were told that the original statements were false. The studies report, however, that most subjects persevered in their newly acquired beliefs, even after being told that the original statements were false. This strongly suggests that humans continue to hold onto acquired beliefs even in the absence of any credible evidence to support them.

Summarize Argument: Phenomenon-Hypothesis
The journal concludes that people retain their acquired beliefs even when they are no longer supported. It points to studies where people formed beliefs on the basis of information, then kept those beliefs after learning the information was inaccurate.

Notable Assumptions
The journal assumes that the inaccurate information provided to participants was the only credible evidence to support their beliefs. It also assumes subjects were convinced that the original information was false, or at least given good reason to believe so.

A
Regardless of the truth of what the subjects were later told, the beliefs based on the original statements were, for the most part, correct.
It isn’t relevant whether their beliefs were correct, only whether there was credible evidence to support them. If the subjects held their beliefs despite lacking evidence for them, the argument stands even if those beliefs were true.
B
It is unrealistic to expect people to keep track of the original basis of their beliefs, and to revise a belief when its original basis is undercut.
This suggests it’s unrealistic to expect the opposite outcome, but does not challenge the conclusion drawn. It’s another possible conclusion of the argument, more strongly supported than the actual conclusion.
C
The statements originally given to the subjects would be highly misleading even if true.
It isn’t relevant that the information was inaccurate or misleading, only that participants first believed it and subsequently learned it was false. This doesn’t say the subjects were aware the statements were false or misleading.
D
Most of the subjects had acquired confirmation of their newly acquired beliefs by the time they were told that the original statements were false.
This suggests subjects held their beliefs based on other credible information. Though their original basis was debunked, they had other evidence supporting their new beliefs.
E
Most of the subjects were initially skeptical of the statements originally given to them.
This doesn’t change the fact that subjects developed new beliefs based on that information, then refused to change them upon learning that information was false. It makes their behavior more surprising, but does not challenge the argument.

104 comments

Millions of female bats rear their pups in Bracken Cave. Although the mothers all leave the cave nightly, on their return each mother is almost always swiftly reunited with her own pup. Since the bats’ calls are their only means of finding one another, and a bat pup cannot distinguish the call of its mother from that of any other adult bat, it is clear that each mother bat can recognize the call of her pup.

Summarize Argument
The author concludes that every mother bat is able to recognize the call of her pup. As evidence, the author states that a bat’s calls are the only means of finding one another, and that a bat pup cannot distinguish calls between adult bats.

Describe Method of Reasoning
The author concludes that a mother bat must be able to recognize the call of her pup by eliminating the possibility of a bat pup recognizing the call of a mother bat.

A
derive a general conclusion about all members of a group from facts known about representative members of that group
The author does not provide facts about representative members of a group. While the author’s conclusion is a general conclusion applying to all mother bats, the author’s premises do not include facts about a specific set of mother bats.
B
establish the validity of one explanation for a phenomenon by excluding alternative explanations
The alternative explanation the author excludes is the possibility of a bat pup recognizing its mother’s call. Since this is not a possibility, the author concludes that the other possibility of a mother bat recognizing its pup’s call is a valid explanation.
C
support, by describing a suitable mechanism, the hypothesis that a certain phenomenon can occur
The author does not describe how mother bats are able to recognize a pup’s call. Rather, the author states this phenomenon as a matter of fact.
D
conclude that members of two groups are likely to share a certain ability because of other characteristics they share
The author only addresses and comes to a conclusion about one group of animals. The author does not make comparisons between bats and any other animal.
E
demonstrate that a general rule applies in a particular case
The author does not provide a particular case that illustrates the conclusion. Rather, the author’s argument is stated generally and theoretically.

64 comments

Sarah: Some schools seek to foster a habit of volunteering in their students by requiring them to perform community service. But since a person who has been forced to do something has not really volunteered and since the habit of volunteering cannot be said to have been fostered in a person who has not yet volunteered for anything, there is no way this policy can succeed by itself.

Paul: I disagree. Some students forced to perform community service have enjoyed it so much that they subsequently actually volunteer to do something similar. In such cases, the policy can clearly be said to have fostered a habit of volunteering.

Summarize Argument: Counter-Position
Paul concludes that the policy can foster a habit of volunteering in students. As evidence, he points out that sometimes when students are forced to participate in community service, those students subsequently actually volunteer to do something similar.

Describe Method of Reasoning
Paul counters the position held by Sarah. He does this by introducing a consequence of forced volunteering that Sarah did not consider: sometimes when students are forced to volunteer they enjoy it so much that they actually volunteer on their own.

A
He argues that Sarah is assuming just what she sets out to prove.
Paul does not argue that Sarah’s reasoning is circular. Rather, Paul introduces a consideration that Sarah’s argument does not consider.
B
He argues that Sarah’s conception of what it means to volunteer excludes certain activities that ought to be considered instances of volunteering.
Paul does not claim Sarah is excluding certain activities from being counted as volunteering. Rather, Paul claims that Sarah’s argument excludes the possibility of students volunteering on their own after first having been forced to volunteer.
C
He introduces considerations that call into question one of Sarah’s assumptions.
Sarah’s assumption is that by forcing a person to volunteer, that person will never actually volunteer on their own accord. Paul counters this by describing some instances where students afterwards volunteer on their own because they enjoyed it.
D
He questions Sarah’s motives for advancing an argument against the school policy.
Paul is not questioning Sarah’s motives. He question’s Sarah’s arguments on its merits instead of focusing on Sarah’s personal characteristics.
E
He argues that a policy Sarah fails to consider could accomplish the same aim as the policy that Sarah considers.
Paul does not introduce an alternative policy. Instead, he points out a consequence Sarah’s argument does not consider.

15 comments