PhronesisWe apply the Displacement Framework to Folie à Deux (Shared Psychosis / Induced Delusional Disorder, ICD-11: Shared Delusional Disorder), formalizing it as interpersonal wrong attractor transmission — a process in which an inducer's established autonomous delusional wrong attractor W_primary overwrites the secondary person's normal reality-testing ground state S⁰_secondary through prolonged close exposure under conditions of social isolation and dominance-submission coupling.
The critical structural prediction of the DF analysis is the basin depth asymmetry: W_primary is an autonomous deep attractor requiring antipsychotic treatment; W_secondary is a shallow induced basin that typically resolves rapidly upon separation from the inducer without medication. Nine formal propositions cover: S⁰_secondary with external calibration access (P1), W_primary as the transmission source (P2), the transmission mechanism through isolation, emotional dependency, and high-certainty inducer modeling (P3), basin depth asymmetry — W_secondary is shallow and separable while W_primary is deep and autonomous (P4), the dominance-submission dynamic as transmission amplifier (P5), social isolation as the critical enabling condition removing corrective feedback (P6), mass psychogenic illness as population-scale folie with social-network transmission (P7), separation as the evidence-based return path for secondary (P8), and inducer treatment as an independent requirement (P9).
The paper analyzes internet-era folie in online communities, cult dynamics as folie à famille, and forensic implications of shared delusional violence.