A 32-year-old male Army veteran with two combat deployments to Afghanistan presents for a psychiatric evaluation. He reports difficulty sleeping, irritability, and emotional numbness for the past 18 months. He describes hypervigilance in public spaces and avoids crowded areas and fireworks. He minimizes his symptoms, stating that many of his fellow service members have it worse. He scores 54 on the PCL-5 but reports he almost did not complete it because some items seemed irrelevant to his experiences. He mentions that his most distressing memories involve a morally complex situation where civilian casualties occurred during an operation. Which assessment consideration is most important when evaluating this veteran?