  For the paradigm of the quantum double-slit experiment (DSE), we apply
Ockham's Razor to interpret quantum observations and to evaluate terminology
often associated with wave-particle duality. One finds that the Correspondence
Principle (CP), combined with classical wave DSEs, e.g., Young [1804], is
sufficient to predict the observed quantum particle and wave phenomena. The
empirical approach of Ockham infers that observed individual quanta are whole
particles only; an individual quantum has no observed wavelike character. The
observed, so-called wave nature of quanta emerges only in the limit of large
numbers of particle observation events. That is, the "measurement problem" is
no problem at all; "particle" and "wave" derive from separate and different
aspects of the observations. Such artificial constructs as wave function
collapse are irrelevant to the observation of individual quanta, each of which
is a "particle" from emission to measurement. The histogram of detected events
is a collective property identical to a classical interference pattern in the
limit of large numbers, as the CP decrees. For a specific individual quantum,
the mystery of what happens in the region between emission and detection has so
far been inaccessible to direct observation in coincidence with detection of
the same quantum on the DSE screen and is therefore inessential to interpreting
the extant database. To analyze actual data and predict future DSEs, therefore,
the Correspondence Principle is sufficient. True scientific progress can only
follow from new, relevant experiments and not via mathematics or imagination.
