Popper 1962, Introduction, XV: "The proper answer to my question 'How can we hope to detect and eliminate error?' is, I believe, 'By criticizing the theories or guesses of others and—if we can train ourselves to do so—by criticizing our own theories or guesses.' (The latter point is highly desirable, but not indispensable; for if we fail to criticize our own theories, there may be others to do it for us.) This answer sums up a position which I propose to call 'critical rationalism'." Popper, Karl (1962). Conjectures and Refutations: The Growth of Scientific Knowledge. London and New York: Basic Books. Retrieved 25 April 2019 – via Internet Archive.
K R Popper (1970), in I Lakatos & A Musgrave (eds.) (1970), at p. 56.
Houck, Max M., Science Versus Crime, Infobase Publishing, 2009, p. 65
cdlib.org
oac.cdlib.org
Correspondence I. American Academy of Arts and Sciences. Free Inquiry (Paul Kurtz) 1973–1983. Reel 319. Box/Folder 297:11. Online Archive of California.
Sturm 2012. Sturm, Thomas (2012). "Bühler and Popper: Kantian therapies for the crisis in psychology". Studies in History and Philosophy of Biological and Biomedical Sciences. 43 (2): 462–472. doi:10.1016/j.shpsc.2011.11.006. PMID22520195.
Akrami 2009, Sec. Popper's Critique of Vienna Circle and the Positivistic Approach: "Trying to analyze and solve the problem of demarcation, Popper came to the conclusion that classical empiricism and logical positivism, particularly as manifested in observationalist-inductivist account of science, must be criticized from a viewpoint that came to be called 'critical rationalism', a term that was used to describe his own philosophy." Akrami, Musa (2009). "Popper on Refutability: Some Philosophical and Historical Questions". In Parusnikova, Zuzana; Cohen, Robert S. (eds.). Rethinking Popper. Boston Studies in the Philosophy of Science. Springer. pp. 397–416. doi:10.1007/978-1-4020-9338-8_11. ISBN978-1-4020-9337-1. OCLC260208425.
Kiesewetter 1995. Kiesewetter, Hubert (1995). "Ethical Foundations of Popper's Philosophy". Royal Institute of Philosophy Supplements. 39 (September): 275–288. doi:10.1017/S1358246100005555.
Popper, K. R. "Of Clouds and Clocks," in his Objective Knowledge, corrected edition, pp. 206–255, Oxford, Oxford University Press (1973), p. 231 footnote 43, & p. 252; also Popper, K. R. "Natural Selection and the Emergence of Mind", 1977.
Sturm 2012. Sturm, Thomas (2012). "Bühler and Popper: Kantian therapies for the crisis in psychology". Studies in History and Philosophy of Biological and Biomedical Sciences. 43 (2): 462–472. doi:10.1016/j.shpsc.2011.11.006. PMID22520195.
Opensociety: "Sir Karl Popper, a philosopher who was a defender of democratic systems of government, died today in a hospital here. He was 92. He died of complications of cancer, pneumonia and kidney failure, said a manager at the hospital in this London suburb." Niemann, Hans-Joachim. "Karl Raimond Popper (1902–1994)". Opensociety.de. Retrieved 12 August 2014.
Thornton 2015 : "Popper professes to be anti-conventionalist, and his commitment to the correspondence theory of truth places him firmly within the realist's camp". Thornton, Stephen (1 January 2015). Zalta, Edward N. (ed.). Karl Popper (Winter 2015 ed.). Metaphysics Research Lab, Stanford University.
Thornton 2015. Thornton, Stephen (1 January 2015). Zalta, Edward N. (ed.). Karl Popper (Winter 2015 ed.). Metaphysics Research Lab, Stanford University.
Thornton 2018. Thornton, Stephen (2018). "Karl Popper". In Zalta, Edward N. (ed.). The Stanford Encyclopedia of Philosophy (Fall 2018 ed.). Metaphysics Research Lab, Stanford University. Retrieved 20 August 2019.
Thornton 2018, Sec. 4. Thornton, Stephen (2018). "Karl Popper". In Zalta, Edward N. (ed.). The Stanford Encyclopedia of Philosophy (Fall 2018 ed.). Metaphysics Research Lab, Stanford University. Retrieved 20 August 2019.
Musgrave, Alan; Pigden, Charles. Zalta, Edward N; Nodelman, Uri (eds.). "Imre Lakatos". The Stanford Encyclopedia of Philosophy (Spring 2023 ed.). Metaphysics Research Lab, Stanford University. Retrieved 12 March 2023. Lakatos's methodology has been seen, rightly, as an attempt to reconcile Popper's falsificationism with the views of Thomas Kuhn.
Akrami 2009, Sec. Popper's Critique of Vienna Circle and the Positivistic Approach: "Trying to analyze and solve the problem of demarcation, Popper came to the conclusion that classical empiricism and logical positivism, particularly as manifested in observationalist-inductivist account of science, must be criticized from a viewpoint that came to be called 'critical rationalism', a term that was used to describe his own philosophy." Akrami, Musa (2009). "Popper on Refutability: Some Philosophical and Historical Questions". In Parusnikova, Zuzana; Cohen, Robert S. (eds.). Rethinking Popper. Boston Studies in the Philosophy of Science. Springer. pp. 397–416. doi:10.1007/978-1-4020-9338-8_11. ISBN978-1-4020-9337-1. OCLC260208425.
