Exclusion-zone phenomena occupy an unusual position in contemporary interfacial science. Gerald H. Pollack and collaborators have reported that water adjacent to certain hydrophilic surfaces develops extended regions that exclude tracer particles and some solutes, carry electrical potential, coexist with proton-enriched regions, exert measurable forces, respond to radiant energy, and may support spontaneous fluid movement. Independent investigators have confirmed that long-range particle-depleted regions can arise near Nafion and have shown that ion exchange, unequal ionic diffusion, electrical fields, electrophoresis, and diffusiophoresis can account quantitatively for substantial aspects of tracer displacement. These findings are often presented as mutually exclusive: either the exclusion zone is a structurally distinct fourth phase of water, or it is an ordinary transport phenomenon requiring no revision of water’s biological role. This paper argues that the binary is premature. It develops Model C, the emergent nonequilibrium-interface model, according to which surface-conditioned water dynamics, ionic redistribution, electrical polarization, chemical gradients, radiant-energy absorption, material mechanics, and transport are reciprocally coupled aspects of a dynamically maintained organization. Model C incorporates conventional electrokinetic and diffusiophoretic mechanisms while asking whether they exhaust the ontology of the interface. The framework separates tracer exclusion from molecular structure, transport mechanism, energy transduction, and biological function; formulates discriminating predictions concerning spatial extent, spectroscopy, gradient neutralization, illumination, thermal controls, geometry, hysteresis, energy storage, and living function; and proposes a preregistered adversarial research programme. Pollack’s structural-phase model remains incompletely established, while transport-dominant explanations remain powerful but potentially incomplete. Model C is therefore advanced not as fact, but as a serious, falsifiable, and potentially unifying research hypothesis.
