Question 12

The first is evidence that serves as the basis for rejecting one explanation of a certain finding; the second is the consultant's own explanation of that finding.

In the consultant's reasoning, the first boldface portion serves as evidence to reject the hypothesis regarding mechanics' competence. The second boldface portion offers an explanation for the observed finding that complex repairs require more focused attention.

A) The first is the consultant's main conclusion; the second provides evidence in support of that main conclusion.

This option is incorrect because the first boldface portion is not a conclusion but rather evidence used to refute a specific explanation. The second portion, while it does provide an explanation, does not support a main conclusion but rather serves as an explanatory statement.

B) The first is evidence that serves as the basis for rejecting one explanation of a certain finding; the second is the consultant's own explanation of that finding.

This option is correct as the first boldface statement provides evidence against the competence hypothesis, while the second boldface statement presents the consultant's reasoning for why mistakes occur in complex repairs, thus explaining the finding.

C) The first is a claim whose truth is at issue in the reasoning; the second provides evidence to show that the claim is true.

This option is incorrect because the first boldface statement is not a claim whose truth is being debated; instead, it is evidence that undermines a particular explanation. The second boldface portion is not evidence but an explanation.

D) The first presents a contrast whose explanation is at issue in the reasoning; the second is the consultant's explanation of that contrast.

This option is incorrect as the first boldface does not present a contrast but rather evidence against a theory. The second portion does explain an observation but does not address a contrast.

E) The first presents a contrast whose explanation is at issue in the reasoning; the second is evidence that has been used to challenge the consultant's explanation of that contrast.

This option is also incorrect because the first boldface does not articulate a contrast. Instead, it provides evidence that supports the rejection of a hypothesis rather than challenging it.

Conclusion

The correct answer, B, clearly identifies the roles of the boldface portions in the consultant's reasoning. The first portion acts as evidence to reject a specific explanation regarding mechanics' competence, while the second provides an explanation for the observed phenomenon. Other options fail to accurately describe the relationship between the statements, demonstrating a misunderstanding of the consultant's argument structure.