This chapter develops the book’s third premise, which is that the brain contains functional quantum infrastructure. If self-observation limits access to quantum coherence in neural systems, as the P = Q/E framework proposes, then the first task is to examine whether biology can sustain quantum processes under physiological conditions. The chapter begins by revisiting the long-standing objection that warm, wet biological systems should decohere too quickly for quantum computation, then follows recent work showing that larger cooperative networks, open-system energy flow, confinement, and decoherence-free subspaces can preserve quantum states in ways earlier models did not account for. From there, the chapter surveys a growing body of evidence from quantum biology, including photosynthesis, magnetoreception, non-targeted radiation effects, and microtubule research, to ask whether evolution may have selected quantum mechanisms for function and survival. Particular attention is given to experimental and theoretical work on tryptophan networks in microtubules, superradiance, subradiance, waveguide quantum electrodynamics, anesthetic modulation, and robust energy migration at body temperature. The chapter also examines neurofilamentary pre-firing dynamics, consciousness-linked coherence signals, and theoretical work on Bose-Einstein condensation in neuronal membranes. Taken together, these lines of evidence point toward a picture in which neural tissue may support fast, distributed, and biologically regulated quantum processes. Within the framework of the book, this infrastructure provides the physical basis for later questions about how consciousness interfaces with computation, how ego mediated interference may regulate access to coherent states, and why human cognition may at times appear to exceed the limits expected from classical neural processing alone.