Question

Difficulty: Very hardComposition and Division (Part to Whole)

Systems Engineer: We have spent the last year evaluating the new autonomous vehicle software's ability to interpret degraded road infrastructure. Our testing reveals that every individual predictive algorithm it employs is highly prone to generating false positives when analyzing obscured traffic signs. Critics have argued that this renders the vehicle unsafe for urban deployment. While I disagree with the critics regarding the vehicle's overall safety, we must concede that the software system as an integrated whole is highly prone to generating false positives when analyzing obscured traffic signs.

Which one of the following contains a flawed pattern of reasoning most similar to the flawed pattern of reasoning exhibited by the systems engineer?

  1. Historian: Records show that every individual piece of circumstantial evidence introduced by the prosecution at the trial failed to conclusively place the defendant at the crime scene. The defense argued this meant the defendant was completely innocent. We need not accept the defense's broader claim to conclude that the prosecution's evidence as a comprehensive body failed to conclusively place the defendant at the crime scene.Answer
  2. B
    Economist: The newly enacted corporate tax legislation as a whole will significantly reduce the financial burden on the manufacturing sector. Opponents fear this will lead to a massive deficit. Even if we dismiss the opponents' fears, it is clear that each specific provision within the legislation will contribute to reducing the financial burden on the manufacturing sector.
  3. C
    Sociologist: Every individual department in the hospital that reported a high turnover rate also experienced severe budget cuts last year. The union claims that poor management caused the turnover. While poor management may be a factor, it is evident that the budget cuts were the primary cause of the high turnover rate in those departments.
  4. D
    Engineer: Every predictive algorithm designed by our team is highly prone to generating false positives. Competitors argue that our algorithms are therefore useless. While they are not useless, we must admit that if a software system does not employ our predictive algorithms, it will not be highly prone to generating false positives.
  5. E
    Politician: The new algorithm is highly predictable in its processing speed, executing millions of operations per second. Privacy advocates worry about the data being collected. Regardless of those privacy concerns, human behavior is never highly predictable, so the algorithm cannot possibly be designed to accurately mimic human behavior.

Answer

The argument regarding the historian and the prosecution's circumstantial evidence.
The systems engineer commits a Fallacy of Composition by arguing that because each individual predictive algorithm (the parts) is prone to generating false positives, the integrated software system (the whole) must also be prone to false positives. This ignores the possibility that the algorithms might compensate for each other's errors when integrated into a unified system. The correct option mirrors this flaw precisely by arguing that because each individual piece of circumstantial evidence (the parts) fails to place the defendant at the scene, the comprehensive body of evidence (the whole) must also fail. It also perfectly matches the rhetorical structure of dismissing an opponent's broader claim before asserting the flawed conclusion.

Step-by-Step Solution

1
Analyze the systems engineer's argument to identify the core premises and conclusion.
The core premise is that every individual predictive algorithm (the parts) is prone to false positives. The conclusion is that the integrated software system (the whole) is prone to false positives.
Isolating the logical core from the rhetorical context (the concession regarding the critics) is essential for mapping parallel reasoning.
2
Identify the logical flaw in the relationship between the core premise and the conclusion.
The argument assumes that a characteristic of each part must also be a characteristic of the whole.
This is the Fallacy of Composition. The integrated system might cross-reference the algorithms to eliminate individual errors, meaning the whole does not necessarily share the vulnerability of its parts.
3
Evaluate the answer choices to find the one that exhibits the identical structural flaw.
The historian's argument reasons that because each individual piece of evidence (the parts) fails to place the defendant at the scene, the comprehensive body of evidence (the whole) must also fail.
This perfectly matches the part-to-whole flawed reasoning structure of the stimulus, while also mirroring the rhetorical concession of dismissing an opponent's broader claim.

Key Concept

Composition and Division (Part to Whole)
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