1. For a detailed discussion, please turn to the paper by Marta Fehér, “The Rise and Fall of Experimentum Crucis”, in: Doxa — Philosophical Studies 6, 1985, pp. 59–97.
2. Karl R. Popper, The Logic of Scientific Discovery. Section 22, note 1. London: Routledge, 1992, p. 87.
3. Ibid.,Section 85, note *2. p. 277.
4. Imre Lakatos, “Falsification and the Methodology of Scientific Research Programmes”, in: John Worall and Gregory Currie (eds.), The Methodology of Scientific Research Programmes, Philosophical Papers by Imre Lakatos Vol. I, Cambridge: Cambridge University Press 1978, p. 69.
5. Ibid.