 In general, a context can be described as a complete set of orthogonal projectors \(\{\Pi_{\alpha}\}\), such that \(\sum_{i} \Pi_{i} = I\) and \(\Pi_{i}\Pi_j = \delta_{ij}\Pi_{i}\), where \(I\) is the identity operator in \(\mathcal{H} \otimes \mathcal{H}\). Each such context generates a Boolean structure, and the state of the system defines a Kolmogorovian probability function on each individual context. However, only the probabilities defined on the preferred context selected by the modal interpretation at hand correspond to physical possibilities, one of which is actual.