  Loophole-free experiments have demonstrated that at least one of three
features is false when the violation of Bell's inequalities is observed:
Locality, Realism or (what is lesser known) Ergodicity. An experiment is
proposed to find out, or at least to get an indication about, which one is
false. It is based on recording the time evolution of the rate of series of
outcomes that are found not-random in a pulsed Bell's setup. The results of
such experiment would be important not only to the foundations of Quantum
Mechanics. For, even if the foundational issue remained not fully decided, they
would have immediate practical impact on the efficient use of quantum-certified
Random Number Generators and the security of Quantum Key Distribution using
entangled states.
