Normal science does not aim at novelties of fact or theory and, when successful, finds none.

Rockefeller Professor of Philosophy remaining there until 1991. : /ˈkuːn/; July 18 1922 – June 17 1996) was an American physicist historian and philosopher of science whose controversial 1962 book The Structure of Scientific Revolutions was deeply influential in both academic and popular circles introducing the term "paradigm shift" which has since become an English-language staple. Kuhn is credited as a foundational force behind the post-Mertonian Sociology of Scientific Knowledge.

Thus our comprehension of science can never rely on full "objectivity"; we must account for subjective perspectives as well. Kuhn made several notable claims concerning the progress of scientific knowledge: that scientific fields undergo periodic "paradigm shifts" rather than solely progressing in a linear and continuous way; that these paradigm shifts open up new approaches to understanding what scientists would never have considered valid before; and that the notion of scientific truth at any given moment cannot be establiThomas Kuhnd solely by objective criteria but is defined by a consensus of a scientific community.