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Difficulty: Very hardNecessary vs. Sufficient Condition Flaws

Philosopher: For a scientific theory to be universally accepted, it must not only withstand rigorous empirical testing but also align with the prevailing metaphysical assumptions of the era. The new theory of quantum gravity has successfully withstood the most rigorous empirical testing currently available. Therefore, provided that this new theory is shown to align with the prevailing metaphysical assumptions of our era, it will inevitably gain universal acceptance within the scientific community.

Which of the following most accurately describes a logical flaw in the philosopher's reasoning?

  1. It infers that satisfying all the explicitly stated prerequisites for a specific status is enough to secure that status.Answer
  2. B
    It fails to distinguish between a theory's objective empirical robustness and its subjective reception by scientific professionals.
  3. C
    It presumes without justification that a theory lacking alignment with prevailing metaphysical norms will invariably fail rigorous empirical testing.
  4. D
    It assumes that the presence of empirical verification directly produces the alignment with metaphysical assumptions observed in accepted theories.
  5. E
    It erroneously concludes that a theory endorsed by the subset of scientists conducting rigorous testing will necessarily be endorsed by the scientific community as a whole.

Answer

The correct response points out that the argument infers that satisfying all the explicitly stated prerequisites for a specific status is enough to secure that status.
The argument establishes that withstanding empirical testing and aligning with metaphysical assumptions are prerequisites (necessary conditions) for a theory's universal acceptance. It then concludes that if a specific theory meets both of these conditions, it will definitely be accepted. This improperly treats the fulfillment of necessary requirements as sufficient to guarantee the result, representing a classic conditional reasoning error known as an illegal reversal.

Step-by-Step Solution

1
Analyze the conditional structure in the philosopher's first sentence.
Universal Acceptance implies both Withstanding Testing AND Aligning with Metaphysics.
The phrase 'it must not only... but also' introduces two necessary conditions for the sufficient condition of being universally accepted.
2
Examine the application of this conditional rule to the new theory of quantum gravity.
The theory already meets the first condition (Withstanding Testing). The conclusion assumes that if it meets the second (Aligning with Metaphysics), it will definitively achieve Universal Acceptance.
Tracking which conditions have been met allows us to isolate the structural leap being made to reach the conclusion.
3
Identify the logical gap between the premises and the conclusion.
The argument reverses the initial conditional statement, concluding that (Withstanding Testing AND Aligning with Metaphysics) guarantees Universal Acceptance.
Fulfilling necessary conditions does not guarantee an outcome, because there might be other unstated necessary conditions required for the outcome to occur.
4
Match the logical gap to the abstract flaw descriptions provided in the options.
The correct option describes treating prerequisites (necessary conditions) as guarantees (sufficient conditions).
This captures the structural essence of an illegal reversal applied to a compound conditional statement.

Key Concept

Necessary vs. Sufficient Condition Flaws
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Necessary vs. Sufficient Condition Flaws

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