Thought interferes with the probability of events, and in the long run therefore, with entropy - David L. Waston (1930)
All project work is probabilistic, driven by underlying uncertainties, both reducible and irreducible. Willing an outcome in the presence of these uncertainties does not make is so. The only useful process to manage in the presence of uncertainty is to estimate the outcome of any decisions made by the participants of the processes by which the project operates