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Zelda: Dr. Ladlow, a research psychologist, has convincingly

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Re: Zelda: Dr. Ladlow, a research psychologist, has convincingly  [#permalink]

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New post 21 Jun 2017, 08:38
Chose E
But reading again came to realize the mistake .
Option B is a better choice .
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Zelda: Dr. Ladlow, a research psychologist, has convincingly  [#permalink]

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New post 18 Jan 2019, 22:26
Marcab wrote:
Zelda: Dr. Ladlow, a research psychologist, has convincingly demonstrated that his theory about the determinants of rat behaviour generates consistently accurate predictions about how rats will perform in a maze. On the basis of this evidence Dr. Ladlow has claimed that his theory is irrefutably correct.

Anson: Then Dr. Ladlow is not responsible psychologist. Dr. Ladlow‟s evidence does not conclusively prove that his theory is correct. Responsible psychologists always accept the possibility that new evidence will show that their theories are incorrect.

Which one of the following can be properly inferred from Anson's argument?

(A) Dr. Ladlow‟s evidence that his theory generates consistently accurate predictions about how rates will perform in a maze is inaccurate

(B) Psychologists who can derive consistently accurate predictions about how rats will perform in a maze from their theories cannot responsibly conclude that those theories cannot be disproved

(C) No matter how responsible psychologists are, they can never develop correct theoretical explanations.

(D) Responsible psychologists do not make predictions about how rats will perform in a maze

(E) Psychologists who accept the possibility that new evidence will show that their theories are incorrect are responsible psychologists.


This question shows a typical reasoning problem that many people encounter.
Given: A results in B.
WRONG: not A results in not B
CORRECT: not B results in not A

Back to the question: GIVEN: not accepting the possibility (A) -> not responsible (B)
Answer E is implying that not A (accept the possibility) -> not B (responsible). Therefore it's wrong.

The correction answer is B, which basically just paraphrases the given.
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Zelda: Dr. Ladlow, a research psychologist, has convincingly &nbs [#permalink] 18 Jan 2019, 22:26

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