  Quantum entanglement between two or more bipartite entities is a core concept
in quantum information areas limited to microscopic regimes directly governed
by Heisenberg uncertainty principle via quantum superposition, resulting in
nondeterministic and probabilistic quantum features. Such quantum features
cannot be generated by classical means. Here, a pure classical method of
on-demand entangled light-pair generation is presented in a macroscopic regime
via basis randomness. This conflicting idea of conventional quantum mechanics
invokes a fundamental question about both classicality and quantumness, where
superposition is key to its resolution.
