Source: 1960s, Prisoner's dilemma: A study in conflict and cooperation (1965), p. v
“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
1940s
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Anatol Rapoport 45
Russian-born American mathematical psychologist 1911–2007Related quotes

Objecting to the placing of observables at the heart of the new quantum mechanics, during Heisenberg's 1926 lecture at Berlin; related by Heisenberg, quoted in Unification of Fundamental Forces (1990) by Abdus Salam ISBN 0521371406
1920s
Becker (1972) "'Radical politics and sociological research" cited in: John Peter Sugden, Alan Tomlinson (2002) Power Games: A Critical Sociology of Sport. p. 108.
Conversation http://www.jgballard.ca/interviews/macbeth_interview_1967.html with George MacBeth on Third Programme (BBC) (1 February 1967)], published in The New S.F. (1969), edited by Langdon Jones
pages 12–13 https://books.google.com/books?id=hwpKAAAAIAAJ&pg=PA12
Relativity for All, London, 1922
"The Real Science Behind Changing Climate", LewRockwell.com, August 1, 2014. https://www.lewrockwell.com/2014/08/lk-samuels/the-real-science-is-suppressed/

Statement of Poisson's law also known as the Law of Large Numbers (1837), as quoted by [Richard Von Mises, Probability, Statistics and Truth, Allen and Unwin, 1957, 104-105]

Source: The Principles of Science: A Treatise on Logic and Scientific Method (1874) Vol. 1, pp. 257, 260 & 271