Analysing Yang's argument :
Premise : Important does not mean essential. After all, no flying machine closely modeled on birds has worked; workable aircraft are structurally very different from birds.
So thinking machines closely modeled on the brain are also likely to fail.
Conclusion : researchers would therefore increase their chances of success if they focus on the brain’s function and simply ignore its physical structure.
Ques :The statement “thinking machines closely modeled on the brain are also likely to fail’ serves which one of the following roles in yang’s argument?
Pre-thinking :The statement "thinking machines closely modeled on the brain are also likely to fail" is clearly not the main conclusion on the argument. But, it is the intermediate conclusion on which the main conclusion is arrived.
Lets analyse the options now :
(A) the main conclusion of the argument -
Incorrect(B) a subsidiary conclusion used in support of the main conclusion -
Correct(C) a principle of research invoked in support of the conclusion -
Incorrect. No research citing this finding has been mentioned but a similar example has been pointed to arrive at this statement.
(D) a particular example illustrating a general claim - -
Incorrect(E) background information providing a context for the argument - -
Incorrect