Probability theory is an ideal tool for formalizing uncertainty in situations where class frequencies are known or where evidence is based on outcomes of a sufficiently long series of independent random experiments. Possibility theory, on the other hand, is ideal for formalizing incomplete information expressed in terms of fuzzy propositions.

p. 205 cited in: Flavio Comim, et al. (2008) The Capability Approach: Concepts, Measures and Applications. p. 298. - Fuzzy sets and fuzzy logic (1995)