Chapter 41: Learning, Sleep, and the Brain

Learning is the PPAS algorithm operating on neural connection weights via synaptic plasticity (Hebbian learning, LTP, LTD), instantiating P vs NP at the cognitive level. Memory consolidation transfers labile representations from hippocampus to neocortex, stabilizing successful prover approximations. The sleep/wake cycle is reinterpreted as the temporal lemniscate’s two lobes, where circadian rhythm (Part II) meets neural computation (Part VI) and sleep serves memory consolidation and synaptic homeostasis. The brain—the consumer sector’s computational organ—is the most complex structure in the known universe.