by the, fully deterministic, Schrödinger equation.

-   The connexion between the mathematical formalism and predictions is given by the Born rule, which allows one to compute the possible results for any experiment, along with the probabilities associated with each possible result.

-   Finally, there is the projection or collapse postulate that states that, after a measurement, the state of the system instantaneously jumps to the eigenstate of the measured property with the eigenvalue corresponding to the measured value.

As it is well known, if the state of the system, before a measurement, is an eigenstate of what is going to be measured, then Born’s rule predicts that, with certainty, the result will be the associated eigenvalue. From this, together with some type of a realist criterion, along the lines of the famous EPR sufficient condition for an element of reality [@EPR], one can conclude what is usually called the Eigenvector-Eigenvalue (EE) rule, which states:

-   A state possesses the value $\lambda$ of a property represented by operator the $O$ if and only if that state is an eigenvector of $O$ with eigenvalue $\lambda$.

At any rate, what is clear is that, within the standard interpretation, the only way to connect 