  This short note is an introduction to the slides from our talks given in 2018
during the Advanced School of Quantum Foundations and Quantum Computation in
Joao Pessoa , Brazil. In these talks, addressed to participants with a limited
knowledge of quantum foundations, we defined locality, causality, randomness,
counterfactual definiteness and we explained EPR-Bohm paradoxes. In particular
we discussed in great detail various Bell-type inequalities and the
implications of their violation in spin polarisation correlation experiments.
Finally we explained why and how the predictive completeness of quantum
mechanics may be tested by more careful examination of the time-series of
experimental data
