Humanrhythm: Cognitive Superposition, Identity Continuity, and Deliberative Dissolution in Human-Algorithmic Coupling

This theoretical-conceptual essay develops Humanrhythm within Sufficient Mirror Theory (SMT) as the rate at which deliberative agency disintegrates under human-algorithmic coupling. Humanrhythm is exclusively dissolutive: it is not a neutral name for integration, and productive human-AI collaboration is not classified as a positive form of Humanrhythm. Cognitive Superposition denotes the state of contested authorship that may arise along the trajectory, when biographical continuity coexists with structural dependence and the relevant external test has not yet been applied. The argument joins the Ship of Theseus, the Sorites Paradox, and Russell's Paradox as philosophical analogies without claiming logical-formal or physical equivalence. The revised operational architecture separates four levels that the parent theory requires to remain distinct: β describes structural coupling; the Agency Fragility Index (AFI) describes the portion of coupled performance that fails to survive withdrawal; the Autonomous Degradation Index (ADI) measures loss relative to the subject's own baseline; and a longitudinal worsening of ADI is proposed as the primary candidate operationalization [E] of the pace of dissolution, while change in AFI remains a complementary fragility trajectory. A new section introduces Sovereign Coupling only as the counter-regime required for discrimination, without redefining the construct formally assigned to Thermodynamics of Sovereignty. The paper further distinguishes substitutive use from generative-engagement use, incorporates ICAP and Productive Failure as antecedent learning frameworks, and adds two falsifiable predictions concerning mode and order of AI assistance. The decisive question is therefore not how deeply a system is integrated during use, but what remains of autonomous competence, authorship discrimination, and metacognitive calibration when the mirror is removed. This record contains the canonical English version and the Portuguese version. Project website: https://www.sufficientmirror.com