PROSENTIR Phase 5: Internal Autonomy vs. Social Sensitivity — The Negative Coupling Between Integration and Cooperation

We present PROSENTIR Phase 5, reporting the results of thelargest experiment in the series (N=200 independent agent pairs,T_game=1000) and establishing the clearest empirical patternacross five papers: internal information integration measuresnegatively predict social cooperation. The central hypothesis — that inter-agent mutual informationMI(M3_A, M3_B) via MINE predicts mutual cooperation — isdefinitively falsified (r=-0.007, p=0.926, N=200). Two secondarymetrics yield highly significant results: C index v2.0(r=-0.203, p=0.004) and Learning-Action coupling L(r=-0.258, p=0.0002) both negatively predict cooperation,consistently across three independent runs totaling N=400simulations. We name this the Internal Autonomy Hypothesis: agents withhigher internal information integration (measured by the digitalsignatures τ, Φ, C, L introduced in Phases 1-4) are lesssensitive to their partner's social state, producing lowermean mutual cooperation. This is a structural consequence ofthe dominant self-model weight (w_S=0.45) consuming socialinput bandwidth. Four explicit limitations are acknowledged before results:no ablation studies, no hyperparameter sensitivity analysis,no baseline comparisons, and restriction to a single socialenvironment (IPD). These define the Phase 6-8 research agenda. Biological grounding is established in the H01 human corticalconnectome (Shapson-Coe et al., Science 2024): the corticallaminar hierarchy is the conceptual analog of PROSENTIR'sabstraction hierarchy, and non-random multisynaptic connectionsin human cortex mirror PROSENTIR's dynamic synchrony finding.The 69%/31% excitatory/inhibitory ratio motivates Phase 7'sthree-agent scenario with asymmetric E/I dynamics. Related work:- Phase 1: 10.5281/zenodo.19912924- Phase 2: 10.5281/zenodo.20019260- Phase 3: 10.5281/zenodo.20090917- Phase 4: 10.5281/zenodo.20265133 Reproducible code: prosentir_v15.py (included).