Premodern · Authority/Father/Order
Modern · Reason/Individual/Liberty
Postmodern · Discourse/Marginalized/Redress
item collision — source's ally is target's enemy (§5.4)
existential mirror — Power-axis inversion, no shared item (§4.1)
The structural asymmetry the wiring exposes: every item collision runs through Modern. Its own allies — Evidence, Consent, Objectivity, the Individual — are literally the enemies listed in the other two stacks, so Modernism is the only regime in direct item-level conflict with both neighbors at once: attacked as Dogma from the Premodern side and Relativism from the Postmodern side (the two-front assault, §4.3). Premodern and Postmodern never collide on a shared item at all — their war is a mirror: the Father at the apex against the Marginalized at the base (§4.1). Drift, absent maintenance, runs toward Premodernism — the factory default (fragility asymmetry, §4.6).