That it is impossible to foretell the future is easily demonstrated. For if a person should foresee being injured by a mill wheel on the next day, the person would cancel the trip to the mill and remain at home in bed. Since the injury the next day by the mill wheel would not occur, it cannot in any way be said that the future has been foretold.
Which of the following best explains the weakness in this argument?The author claims you cannot predict the future because if someone foresaw an injury at the mill tomorrow, they would stay home, so the injury would not happen, and therefore the future was not really foretold.
(A) The author fails to explain how one could actually change the future.
The argument does give a way the outcome changes, the person cancels the trip. So this is not the weakness.
(B) The author uses the word future in two different ways.
This is the weakness. The author treats the future as both
fixed and changeable, switching between (1) what would happen if the person went to the mill and (2) what actually happens after the prediction changes the person’s choice. That switch is the core flaw, it is a kind of
self defeating prediction setup, not proof that prediction is impossible.
(C) The author does not explain how anyone could foresee the future.
Not the weakness. The argument is about logic, not about the mechanism of foreseeing.
(D) The argument is internally inconsistent.
The reasoning is questionable, but “internally inconsistent” is too vague here. The specific problem is the shift in what “the future” refers to, which (B) captures directly.
(E) The argument is circular.
Not circular. The conclusion is not assumed in a premise.
Answer: (B)