Quantum entanglement is the most primitive form of measurement, and the math is very similar between them. Watch as interference in a two-slit experiment disappears when measurement is taken on them. Quantum entanglement is measurement with only 2 particles involved, while other measurement involves 3 or more and is practically irreversible. In either case, no information can be transmitted once quantum entanglement or measurement has taken place. In the zero universe interpretation of quantum mechanics based on math, the classical universe is not real, but the quantum one with undetermined possibilities is all there is. An interesting demonstration of polarization showing quantum effects is included.