“…Despite long discussions, we do not have an unquestionable answer to these and similar questions. And while Boltzmann's theorem plays an increasingly important role in the most 44 For the Polish original see , p. 8 & Kokowski 2021 In the terminology developed by the author of the article the hypothetical-deductive method of correspondence-oriented thinking, the hypothetical beings postulated in the context of theory are actually quasi-beings -see Kokowski 1996. In the case under consideration, Natanson saw a striking contradiction between the quasi-entities postulated by wave optics and the new quantum optics, and saw the need to search for a more general theory of optical phenomena with new quasi-entities that would avoid the contradictions of these theories, while preserving the already discovered partial truths -laws of phenomena consistent with the predictions of the hitherto theories; on partial truths in the mathematico-physical sciences, see Costa, French 2003. difficult research today, we are reaffirmed, quite bitterly, in the observation that great generalizations of science, while they are fruitful and beneficial, tend to be the most obscure (translation -M. Kokowski). 45 Natanson 1924b, pp.…”