Anthropologist: During the last ice age, nomadic communities probably needed at least 15 or 20 members to survive, and they were generally not much larger than this. Ice-age nomads are commonly portrayed as primarily big-game hunters, but most of their food must have in fact come from other sources, such as small game and plants. Hunting large animals is a dangerous activity that would have risked the lives of several members of the community.

Summarize Argument: Counter-Position
The anthropologist concludes that ice-age nomads’ food mostly came from plants and small animals, not big-game hunting as many people believe. In support, the anthropologist says that ice-age nomad communities likely only had about 15 to 20 members, and that big-game hunting would have risked multiple community members’ lives. This supports the idea that ice-age nomads would generally avoid big-game hunting.

Identify Argument Part
The text indicated by the question stem is the position the argument seeks to counter. The common portrayal of ice-age nomads as big-game hunters is shown to be a misconception by the anthropologist’s argument.

A
It is a premise used as support for the overall conclusion of the anthropologist’s argument.
The statement about ice-age nomads’ portrayal is not a premise, because it doesn’t support the argument’s conclusion. The claim that many people think ice-age nomads were big-game hunters gives us no reason to believe that nomads mostly got food from other sources.
B
It is a clarification of one of the premises of the anthropologist’s argument.
The statement that ice-age nomads are commonly portrayed as big-game hunters is unrelated to the argument’s premises, and definitely doesn’t clarify them. The premises are about how ice-age nomads actually lived, not about their popular depiction.
C
It is an objection that the anthropologist raises against an opposing theory.
Firstly, the argument doesn’t present an opposing theory, just a common misconception and an explanation of why it’s wrong—so this can’t be true. Secondly, the anthropologist doesn’t use this statement to make any kind of point; it’s not a premise of any kind.
D
It is the overall conclusion of the anthropologist’s argument.
The statement about common depictions of ice-age nomads isn’t the conclusion because nothing else in the argument supports it. The anthropologist’s conclusion, supported by factual premises, is that ice-age nomads mostly got their food from plants and small animals.
E
It describes a claim that the anthropologist attempts to refute.
This is exactly the role played by the claim that ice-age nomads are often portrayed as big-game hunters. The anthropologist’s argument is focused on proving why that portrayal is wrong, by showing that ice-age nomads mostly ate plants and small animals.

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Montoya: Many industrial chemical processes that currently use organic solvents could use ionic liquids instead. Ionic liquids are less hazardous to workers and generate less air pollution. Moreover, some reactions occur at a faster rate or yield smaller quantities of unwanted by-products when ionic liquids are used. So chemical companies should begin using ionic liquids for many reactions that currently use organic solvents.

Peterson: Ionic liquids cost many times as much as organic solvents, so they are currently not practical for the chemical industry.

Summarize Argument
Montoya believes that chemical companies should switch from organic solvents to ionic liquids. Peterson disagrees, arguing that ionic liquids are not practical because they cost many times more than organic solvents.

Notable Assumptions
Peterson assumes that the cost of purchasing ionic liquids outweighs the money that the liquid’s benefits could save.

A
The cost of organic solvents is only one of many expenses involved in industrial production of chemicals.
This does not impact the reasoning at all. The fact that it is “one of many” does not cast doubt on how large the price is relative to other expenses.
B
New methods for removing by-products of chemical reactions have recently been developed.
If anything, this weakens Montoya’s argument because it provides less of an incentive to switch to ionic liquids
C
The chemical industry has historically been quick to adopt new techniques that increase the rate at which reactions occur.
This does not impact Peterson’s reasoning. Peterson is primarily focused on the costs outweighing the benefits.
D
Ionic liquids can be reused many times, whereas organic solvents can be used only once.
If ionic liquids can be reused many times, their higher initial cost might be made up, making them more cost-effective in the long run. This directly challenges Peterson’s main conclusion.
E
For the sake of public relations, companies will sometimes use a more environmentally friendly process even if it is slightly more expensive.
This does not impact the reasoning in the argument at all. Why a company chooses to switch to an environmentally sound process is completely unrelated.

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Actors generally learn their lines by focusing on the meanings of the words, the motivations of the characters uttering them, and the physical and emotional dimensions of their own performances. It seems likely that memory can be enhanced by factors such as emotion, action, and context, so this approach is probably more effective than mere rote memorization.

Summarize Argument: Phenomenon-Hypothesis

The author concludes that actors learn lines more effectively by focusing on the meanings, motivations, and physical and emotional aspects of performance, rather than simply using rote memorization. She supports this by hypothesizing that factors like emotion, action, and context can likely improve memory.

Notable Assumptions

The author assumes that, because factors like emotion, action, and context can likely improve memory generally, they also likely improve memory in the context of learning lines. She also assumes that the actors’ approach is more effective than rote memorization without considering any potential benefits of rote memorization.

A
Test subjects are best able to remember items on a shopping list when they are also told how those items will be used.

This strengthens the argument by providing data to support the hypothesis that context improves memory. This then strengthens the conclusion that contextualization is an effective approach to learning lines.

B
The actors who are able to deliver the greatest amount of dialogue most effortlessly are those who have spent the most time learning their lines.

This does not strengthen the argument because it doesn’t address the memorization method used. We don’t know if the actors in (B) used the author’s described approach, rote memorization, or another method.

C
Actors are more readily able to remember lines learned while making an appropriate motion—for example, walking across a stage—than lines learned without an accompanying action.

This strengthens the argument because it provides an example that supports the hypothesis that emotion, action, and context can improve memory. If actors memorize better by linking lines to actions, the author’s conclusion that this is an effective approach is much stronger.

D
People who try to memorize information by imagining that they are conveying it to somebody else who needs the information show higher retention than those who try to memorize the material by rote.

This strengthens the argument by providing an example in which memorization that involves emotion, motivation, and contextualization is more effective than rote memorization.

E
People with no acting experience are able to memorize and deliver lines from a play more accurately after they have read and understood the entire play.

This strengthens the argument by showing that line-learning is enhanced by understanding the context of a play. This supports the hypothesis that context improves memory and thus also supports the conclusion that this is an effective approach to learning lines.


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A truly visual art form—for example, painting—is one in which time plays no essential role. Though it takes time to look at a painting, there is no fixed order in which one must look at its parts, and no fixed amount of time one must spend examining it. In contrast, most art forms, such as poetry and music, are essentially temporal; that is, they require performance, which means they must be experienced in a fixed order and over a roughly fixed amount of time. Poetry, for instance, though often written down and thus seemingly a visual art, actually must be performed, even if the performance is only a silent reading to oneself.

Summary
The stimulus can be diagrammed as follows:

Notable Valid Inferences
Temporal art forms must be experienced in a fixed order and over a fixed amount of time.

Temporal art forms are not truly visual.

Truly visual art forms are not temporal.

Truly visual art forms do not require performance

Most art forms are not truly visual.

A
Truly visual art forms do not essentially involve performance.
Must be true. As shown below, if we take the contrapositive of the conditional chain, we see that a truly visual art form does not require performance.

B
Poetry is less like music than it is like painting.
Could be false. We don’t have enough information to compare how similar these art forms are.
C
Spatiality and temporality are mutually exclusive components of art forms.
Could be false. The stimulus does not indicate that spatiality and temporality can never coexist in art.
D
Art forms that must be examined for an extended period of time in order to be understood are essentially temporal.
Could be false. (D) introduces topics that are not included in the stimulus, like understanding (rather than experiencing) art and extended (rather than fixed) periods of time.
E
Anything capable of being performed is either musical or poetic, or both musical and poetic.
Could be false. We know that all performances must be experienced in a fixed order and over a roughly fixed amount of time, but we don’t know that all performances are either musical or poetic––music and poetry are just referenced as two possible examples of performance.

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