Examkin

Question

Difficulty: Very hardFlaw in the Reasoning

Neurologist: The conscious perception of visual stimuli invariably triggers a specific sequence of widespread neural activation in the prefrontal cortex, known as the P-wave cascade. During our latest experiments with anesthetized subjects, we observed the precise P-wave cascade in several patients when they were exposed to intense flashes of light. This demonstrates that, contrary to conventional medical consensus, anesthetized patients are capable of consciously perceiving visual stimuli.

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

  1. The argument interprets evidence that a specific cognitive state invariably produces a certain neurological outcome as establishing that the outcome cannot occur in the absence of that state.Answer
  2. B
    The argument concludes that a cognitive state is present by improperly treating a physiological condition that is sufficient to indicate that state as one that is necessary for it.
  3. C
    The argument infers a direct causal connection between visual stimuli and the P-wave cascade on the basis of a mere temporal correlation observed in recent experiments.
  4. D
    The argument attempts to refute a widely accepted medical consensus solely by calling into question the integrity of the clinical data upon which that consensus was built.
  5. E
    The argument relies on an intermediate conclusion regarding the exact neurological sequence of the P-wave cascade that is fundamentally unsupported by the provided experimental data.

Answer

The correct answer is the option stating that the argument interprets evidence that a specific cognitive state invariably produces a certain neurological outcome as establishing that the outcome cannot occur in the absence of that state.
The argument explicitly states that conscious perception 'invariably triggers' the P-wave cascade, establishing the cascade as a necessary condition of conscious perception. However, by concluding that conscious perception must be present simply because the cascade was observed, the author illicitly treats the cascade as a sufficient condition. By doing so, the author assumes the outcome (the cascade) cannot possibly occur in the absence of the state (conscious perception).

Step-by-Step Solution

1
Identify the main conclusion of the argument.
The conclusion is that anesthetized patients are capable of consciously perceiving visual stimuli.
Isolating the main conclusion is the required first step to analyze the logical structure of any argument.
2
Identify the premises provided to support the conclusion.
Premise 1: Conscious perception invariably triggers the P-wave cascade. Premise 2: The P-wave cascade was observed in anesthetized subjects.
Understanding the evidence reveals how the author attempts to justify their conclusion.
3
Analyze the formal logical relationship between the premises and the conclusion.
The first premise establishes a conditional relationship: Conscious Perception → P-wave cascade. The author then observes the necessary condition (P-wave cascade) and illicitly deduces the presence of the sufficient condition (Conscious Perception).
Mapping the conditional logic uncovers the structural vulnerability: affirming the consequent (or Mistaken Reversal).
4
Evaluate the options to find the abstract description of this formal flaw.
The correct description notes that the author takes evidence of 'State → Outcome' and interprets it as establishing 'Outcome cannot occur without State' (which is logically equivalent to Outcome → State).
This abstract phrasing perfectly captures the argument's assumption that nothing other than conscious perception could have caused the P-wave cascade.

Key Concept

Conditional Logic Flaws: Mistaken Reversal (Affirming the Consequent)
Rate this question

Topics

Flaw in the Reasoning

More questions from this topic