Some historical remarks o About 30 years ago, probably as a result of the famous discussions between bohr einstein Schrodinger, Heisenberg, Pauli, de broglie, and others, the majority of physicists thought that the so-called Copenhagen interpretation"is the only sensible attitude for good scientist o nowadays the attitude of physicists is much more moderate for several reasons:(1) More consist interpretations have been found.(2) The discoveries and ideas of Bell. (3 Advances in experimental techniques makes it possible for fine control of quantum systemsI. Some historical remarks ⚫ About 30 years ago, probably as a result of the famous discussions between Bohr, Einstein, Schrödinger, Heisenberg, Pauli, de Broglie, and others, the majority of physicists thought that the so-called “Copenhagen interpretation” is the only sensible attitude for good scientist. ⚫ Nowadays, the attitude of physicists is much more moderate for several reasons: (1) More consist interpretations have been found. (2) The discoveries and ideas of Bell. (3) Advances in experimental techniques makes it possible for fine control of quantum systems