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Difficulty: MediumAnalyzing Counterarguments and Opposing Viewpoints

Passage:
For decades, comparative psychologists maintained that tool innovation in corvids was driven exclusively by social learning and observational tradition within avian flocks. Proponents of this view argued that young crows acquired complex foraging techniques solely by mimicking adult behavior, pointing to regional variations in tool shape as definitive evidence of cultural transmission. However, recent experimental trials with isolated, lab-raised New Caledonian crows have challenged this strict cultural consensus. Juveniles raised without exposure to adult tutors or pre-fabricated tools nevertheless constructed functional leaf-stripping implements when presented with raw materials. While these findings demonstrate that basic tool manufacturing possesses an innate genetic component, they do not completely negate the role of social interaction. Rather, the innate cognitive blueprint provides a structural foundation upon which social refinement can subsequently occur.

Based on the passage, what is the primary rhetorical purpose of citing the experiment involving lab-raised New Caledonian crows?

  1. To introduce a counterargument that refutes the assumption that corvid tool manufacture depends entirely on social learningAnswer
  2. B
    To establish that social interaction plays no meaningful role in how crows refine complex foraging techniques
  3. C
    To prove that regional variations in tool shape are caused directly by genetic differences between crow populations
  4. D
    To describe the precise physical steps required for young crows to strip leaves into functional foraging implements

Answer

The primary rhetorical purpose of citing the experiment with lab-raised New Caledonian crows is to introduce a counterargument that refutes the assumption that corvid tool manufacture depends entirely on social learning.
The passage presents the experiment with isolated, lab-raised crows directly after outlining the traditional belief that tool use was acquired 'solely by mimicking adult behavior.' Showing that untutored crows could build tools serves as counter-evidence against the claim that tool building relies exclusively on social learning.

Step-by-Step Solution

1
Identify the main claim presented at the beginning of the passage.
The traditional view held that corvid tool innovation was driven exclusively by social learning and mimicking adult behavior.
Understanding the baseline assumption is essential for evaluating why opposing evidence is introduced.
2
Analyze the transition word and the evidence introduced in the middle of the passage.
The word 'However' introduces experimental trials where untutored, isolated crows built tools without adult models.
This experiment directly challenges the exclusive reliance on social learning.
3
Determine the rhetorical function of this experimental evidence relative to the main claim.
The experiment serves as a counterargument establishing an innate genetic component to tool manufacturing.
The author presents this evidence specifically to oppose the previous consensus that tool use was solely cultural.

Key Concept

Analyzing Counterarguments and Opposing Viewpoints
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Topics

Analyzing Counterarguments and Opposing Viewpoints

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