Student: My paper was not graded in accordance with the professor's stated criteria. The professor said that she would give A's only to papers whose conclusions were supported by reliable statistical evidence. The professor acknowledges that my conclusions were supported by reliable statistical evidence, but she gave my paper a B.
The reasoning in the student's argument is flawed in that the argumentThe professor said reliable statistical support was required for an A. The student had reliable statistical support and therefore thinks the paper should have received an A.
The flaw is treating a necessary condition as if it were
enough to guarantee the grade.
(A) discusses the professor's stated criteria in order to draw attention away from the shortcomings of the student's paper
This is not the flaw. The student may be ignoring other possible shortcomings, but the precise logical error is about misunderstanding the stated condition.
(B) attempts to draw an evaluative conclusion solely on the basis of factual claims
This is too broad. The issue is not simply factual claims versus evaluation. The issue is that the student misuses the professor’s grading rule.
(C) takes a condition that is among the requirements for a particular grade to be a condition that is enough to guarantee that grade
This is correct. “A’s only to papers with reliable statistical evidence” means reliable evidence is required for an A. It does not mean every paper with reliable evidence must get an A.
(D) is based on the report of a biased participant in the controversy
This is not the main flaw. Even if the student is biased, the logical error can be identified directly from the argument.
(E) fails to make a necessary distinction between the professor's grading criteria and the objective criteria of a paper's quality
This is not the issue. The argument concerns the professor’s own stated criteria, not objective standards of paper quality.
Answer: (C)