“A mature science is governed by a single paradigm.”
Source: What Is This Thing Called Science? (Third Edition; 1999), Chapter 8, Theories as structures I: Kuhn's paradigms, p. 109.
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Alan Chalmers 17
Australian philosopher of science 1939Related quotes

2010s
Source: Joao Medeiros. " The city in numbers: An equation that explains urban life http://www.wired.co.uk/magazine/archive/2011/05/start/the-city-in-numbers," in wired.co.uk/magazine 29 March 2011.
Source: Introduction to General Systems Thinking, 1975, p. 34; Quote in: Franz Pichler, Roberto Moreno Diaz (1993. Computer Aided Systems Theory. p. 134

Speech in Tamworth (15 June 1970), from Simon Heffer, Like the Roman. The Life of Enoch Powell (Phoenix, 1999), p. 563.
1970s

Cited in: David Ballin Klein (1977) The Unconscious: Invention Or Discovery? p. iii;
A History of Experimental Psychology, 1929
Source: Ludwig von Bertalanffy (1901-1972) (1989), p. 2, footnote 4.

Source: Sustainable History and the Dignity of Man (2009), p.27

"Axiomatic Thought" (1918), printed in From Kant to Hilbert, Vol. 2 by William Bragg Ewald