Every axiomatic (abstract) theory admits, as is well known, an unlimited
number of concrete interpretations besides those from which it was
derived. Thus we find applications in fields of science which have no
relation to the concepts of random event and of probability in the precise
meaning of these words.
---A.N. Kolmogorov
Foundations of the Theory of Probability,
2d English ed.,
translation edited by Nathan Morrison,
Chelsea, New York, 1956, page 1; for the German original see
Grundbegriffe der Wahrscheinlichkeitsrechnung,
Springer-Verlag, Berlin--New York, 1977, reprint of the 1933 original.
to
Quotes selected by Palle Jorgensen