The notion of local hidden variables is now introduced by considering the following question:

Because we have no control over the hidden variables, the contradiction derived above cannot be directly tested in an experiment.

A few advocates of deterministic models have not given up on local hidden variables.

It will be the "hidden variable" in our model.

He was particularly interested in the measurements of hidden variables.

The positions and momentums of the particles are considered to be the hidden variables.

It turns out that there is a much more serious challenge to the idea of hidden variables.

The verdict was clear: there are no hidden variables of the sort Einstein envisioned.

Since so-called hidden variables are involved, the theory must deal with the Bell inequalities.

There is the possibility of "hidden variables" that might be operating, but here are some ideas.