Accusing someone of being so detached from reality that their factual claims or beliefs constitute a clinical delusion—a fixed, false belief resistant to reason. This is deployed when someone holds a view perceived as so obviously false or fringe that engaging with evidence seems pointless; instead, you attack their very grip on reality. It's an escalation beyond calling someone "wrong," claiming they are living in a fantasy world.
Example: In a flat-Earth debate, a scientist presents satellite imagery and curvature calculations. A flat-Earther might respond, "You're brainwashed by NASA!" To which the scientist, in frustration, might snap, "I'm not arguing anymore, I'm just worried about your crippling case of the delusion card." It's a terminal insult for a debate, declaring the other person fundamentally unreachable.
by Abzugal February 3, 2026
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