Borderline personality disorder, a diagnosis that cannot be challenged: If rejecting the diagnosis is a symptom, can the diagnosis ever be wrong? A response to Chazhoor and Younger (2026)

Objective: Chazhoor and Younger describe borderline personality disorder (BPD) as a diagnostic and management challenge in regional inpatient psychiatry, including patients' reluctance to accept the diagnosis and preference for autism, attention-deficit/hyperactivity disorder (ADHD) or complex post-traumatic stress disorder (CPTSD). This Perspective examines the epistemic assumptions embedded in that framing and their implications for trauma, neurodivergence, gender diversity, sensory distress and iatrogenic harm.Conclusions: Diagnostic disagreement is not evidence for the diagnosis being disputed. BPD is itself historically and culturally situated, and its application can relocate traumatic, neurodevelopmental, sensory and minority-stress-related distress into a purportedly disordered personality. When dissent, self advocacy or reports of harm are reinterpreted through the same construct, diagnostic reasoning risks becoming recursive and unfalsifiable. I argue for moving beyond BPD towards trauma-informed, neurodiversity-affirming, sensory-informed and epistemically just formulations that remain open to revision.