  It is argued that the nature of probability is essentially informational
rather than physical and that quantum mechanical predictions should be viewed
as logical inferences made on the basis of the information content of a given
experimental situation. By implementing such a viewpoint, it is possible to
maintain a sharp distinction between the physical and statistical aspects of
quantum mechanics. The idea is applied to the double-beam interference
experiment, reproducing the results of the standard formulation of quantum
mechanics in a manner that renders the notion of wave-particle duality
superfluous.
