Two longstanding open problems are resolved from BCT void geometry. (1) 2D turbulence: the inverse cascade direction follows from scalar Hopf charge conservation in 2D; the energy exponent −5/3 follows from 3D molecular void geometry operating in all fluids; the enstrophy exponent −3 follows from Ω=H² requiring two simultaneous Hopf transfers. All three Kraichnan laws: zero free parameters, exact. (2) The measurement problem: wavefunction collapse is irreversible Hopf charge lock between a quantum system and macroscopic apparatus. The quantum-classical boundary occurs at Ncollapse = 1/α₀ ≈ 135 coupled modes. Below 135: quantum coherence survives. Above 135: irreversible collapse. Consciousness plays no role. The boundary is geometric.
Michel Robert Cabrié (Sun,) studied this question.