Quantum entanglement cannot be created from a tensor product
Entangled state is a state that can not be written in terms of a tensor product of two qubits
Entanglement creates some kind of correlation between the qubits
Partial measurment = probability theory ??
Photon polarization is the direction of the electric field of the photon, is it vertical or horizontal
The presence of hidden variable defies non locality, like the particle has properties that are not related to measurment.