 Since it is impossible to devise a deterministic chain linking the inter-mediate state with the outcome of the game, the most complex component of any indeterministic method is assessing these intermediate stages.It is precisely the function of predispositions to assess the impact of an intermediate state upon the future course of development.” 
According to Katsenelinboigen, calculus of predispositions is another method of computing probability.Both methods may lead to the same results and, thus, can be interchangeable.