Anthropology
Anthropology is the study of humans and human behaviour and societies in the past and present. Social anthropology and cultural anthropology study the norms and values of societies. Linguistic anthropology studies how language affects social life. Biological or physical anthropology studies the biological development of humans.
Political Science
Political science is a social science which deals with systems of governance, and the analysis of political activities, political thoughts and political behavior. It deals extensively with the theory and practice of politics which is commonly thought of as determining of the distribution of power and resources. Political scientists "see themselves engaged in revealing the relationships underlying political events and conditions, and from these revelations they attempt to construct general principles about the way the world of politics works."
Science
Science (from Latin scientia, meaning "knowledge") is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe.
Sociology
Sociology is the scientific study of society, including patterns of social relationships, social interaction, and culture. It is a social science that uses various methods of empirical investigation and critical analysis to develop a body of knowledge about social order, acceptance, and change or social evolution. Many sociologists aim to conduct research that may be applied directly to social policy and welfare, while others focus primarily on refining the theoretical understanding of social processes. Subject matter ranges from the micro-sociology level of individual agency and interaction to the macro level of systems and the social structure.
Sociology
The critique of Parsons exploded sociological theory into a thousand glittering but laughably parochial fragments of nano-theories. The contemporary culture of sociology is to treat social theory as set of personal expressions of literati and pseudo-philosophers. Surveying contemporary sociological theory is like going to the art museum. There we see lots of brilliant works, each the product of an artist's imagination. Certainly there is no attempt by artists to form a unified aesthetic vision. Nor should there be. But science is not art. A science becomes mature when the efforts of all researchers are coordinated by an underlying core model. This truth is denied in contemporary sociological culture.
Herbert Gintis, Review of An Invitation to Reflexive Sociology (December 6, 2009)
Anthropology
Anthropology is never an exact science; the observer never experiences the same culture as the participant.
Orson Scott Card, Speaker for the Dead, (1986)
Sociology
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 ra~onale) 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