Furthermore, Deutsch's method might not work with common probability calculations in quantum mechanics, like path integrals, unless we take into account the chance that the system goes through different paths that all lead to the same outcome. There can also be multiple solutions (fixed points) for the system's state after the loop, introducing a form of randomness (nondeterminism). Deutsch suggested using the solution with the highest entropy, which aligns with the natural tendency of systems to evolve towards higher entropy states.