The Free On-line Dictionary of Computing (30 December 2018):

neutrosophic probability

    An extended form of probability based on
   Neutrosophy, in which a statement is held to be t true, i
   indeterminate, and f false, where t, i, f are real values from
   the ranges T, I, F, with no restriction on T, I, F or the sum
   n=t+i+f.

   (http://gallup.unm.edu/~smarandache/NeutProb.txt).

   ["Neutrosophy / Neutrosophic Probability, Set, and Logic",
   Florentin Smarandache, American Research Press, 1998].

   (1999-10-04)