However these probabilities cannot account for the intensity pattern except for the points halfway between the bright and dark fringe. Thus a sequence of quantum events do not always have a probabilistic description. The study of decoherence is a very active research frontier at this time. In other cases it is not meaningful to even assign a probability distribution to dynamical variables. In their place quantum mechanics allows the concept of probability amplitudes.
Comprehension demands the escalation of our conceptual repertoire.
All these motions include instabilities in the sense that small deviations in initial conditions would lead to large deviations in the long run. Most of these motions have almost cyclic processes. In each style the difference is small but amplified. Therefore if we take the number of cycles as an additional role we may see the motion as more regular. The motion has to be unfolded in one additional dimension as a helix.