Passage Summary: A rule says you only call out plagiarism if you think the student did it on purpose; the conclusion is that a specific professor shouldn't call out a specific student.

Conclusion: Professor Serfin should not officially determine that Walters committed plagiarism.

Reasoning: The principle states that such a determination requires the professor to believe the student knowingly presented others' ideas without attribution.

Analysis: The principle sets a necessary condition for a plagiarism charge: the professor must believe it was intentional. To reach the conclusion that the charge shouldn't happen, we need to show that this necessary condition wasn't met. Look for an answer that confirms Professor Serfin does not believe Walters acted knowingly. If the professor thinks it was an honest mistake, the rule forbids the official determination.