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Zorluk: OrtaNecessary Assumption

Marine Biologist: Octopuses exhibit complex problem-solving behaviors, such as unscrewing jars to retrieve food, despite possessing a nervous system that lacks a centralized cerebral cortex. Some researchers have claimed that these behaviors are merely rigid, hard-wired instinctual motor routines rather than flexible learning. However, in laboratory trials, when the standard opening mechanism of a food container was altered, octopuses altered their manipulation strategies within minutes to successfully open the modified container. Hence, octopuses' problem-solving abilities must involve flexible cognitive processing rather than invariant instinctual motor routines.

Which one of the following is an assumption on which the marine biologist's argument depends?

  1. A
    Any animal capable of successfully opening an unfamiliar food container in an experimental setting possesses flexible cognitive processing.
  2. B
    Octopuses always rely on trial-and-error physical manipulation rather than perceptual planning when encountering novel obstacles.
  3. The rapid changes in the octopuses' manipulation strategies were not merely the activation of separate instinctual motor routines triggered by the modified container.Cevap
  4. D
    Vertebrate animals with centralized cerebral cortices require more time than octopuses to solve comparable physical manipulation tasks.
  5. E
    An organism that possesses flexible cognitive processing will invariably modify its physical behavior when confronted with an altered task.

Cevap

The argument depends on the assumption that the rapid changes in the octopuses' manipulation strategies were not merely the activation of separate instinctual motor routines triggered by the modified container.
The conclusion asserts that because octopuses altered their manipulation strategies to open a modified container, their problem-solving cannot be explained by invariant instinctual routines. For this inference to hold, it is necessary to assume that the observed behavioral adjustments were not themselves pre-programmed instinctual subroutines triggered by the new container. Negating this statement means the behavioral shift was merely another hard-wired instinctual reaction, which completely destroys the author's claim that flexible cognitive processing must be responsible.

Adım Adım Çözüm

1
Deconstruct the argument into premises and conclusion
Premise: Octopuses modified their manipulation strategies within minutes when the opening mechanism of a food container was altered. Conclusion: Octopus problem-solving involves flexible cognitive processing rather than invariant instinctual motor routines.
Identifying the exact logical leap between the experimental observation and the author's conclusion reveals the unstated assumption.
2
Identify potential logical gaps or alternative explanations
The author concludes that switching strategies rules out instinct. For this to hold, the strategy switch itself must not be an innate, hard-wired secondary instinct triggered by the new container.
A necessary assumption must defend the conclusion against potential alternate explanations that remain compatible with the premises.
3
Apply the Negation Test to candidate assumptions
Negating the statement that the shifts were not separate instinctual routines yields: 'The rapid changes were merely the activation of separate instinctual motor routines.' This directly shatters the conclusion.
A necessary assumption is logically indispensable; its negation must fatally undermine the validity of the argument's conclusion.

Anahtar Kavram

Necessary Assumption (Defender Model and the Negation Test)
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Necessary Assumption

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