Final answer:
Without specific guidelines or context, it cannot be determined if a Commander can direct that an evaluation report be changed; more information about the organizational rules or laws is needed.
Step-by-step explanation:
The question posed is regarding whether a Commander can direct that an evaluation report be changed. Given the context provided, it seems that the concept of altering evaluation reports would fall under a procedural or ethical guideline, which could vary by the specific organization's rules or by law. Since the provided information does not offer concrete details about such guidelines and focuses on the subjectivity of evaluations and the scientific method, we cannot determine whether a Commander has the authority to direct a change in an evaluation report without additional context. Hence, the correct answer is Cannot be determined.