 To implement conditionalisation, introduce a random variable \(\mathbf{x}\), called the facts, on which to conditionalise. One could interpret the facts as the totality of common causes, but simpler interpretations are also possible. The facts could be some proxy of common causes. Most commonly, \(\mathbf{x}\) is the fact determining the correct alternative. This correct-making fact is standardly called the state (of the world). In a court’s convict-or-acquit decision, its possible values could be “guilty” and “innocent”, which make “convict” or “innocent” correct, respectively.  Section 2.1,  Section 4.1 and  Section 5.1  discuss the state.