Whether sociology can ever become a full-fledged "science" (a description of a class of events predictable on the basis of deductions from a constant rationale) depends on whether the terms which sociologists employ to describe events can be analyzed into quantifiable observables.

Anatol Rapoport, "Outline of a probabilistic approach to animal sociology: I." The Bulletin of mathematical biophysics 11.3 (1949): p 183