Uncertainty: Lack of certainty
- what is neither determinedly true nor
determinedly false, and hence in some sense
and to some degree probable.
There are several ways and senses in which a statement can be quite
determinedly uncertain, and standard probability
theory is one good approach to
such statements. There are others, and also quite a few different kinds
and sorts of probability theory.
Note one very
fundamental case of uncertainty: Concerning
contingent statements about the
future. This differs from uncertainty about the past in that what is in
the past definitely has happened or definitely has not happened, whereas
what is contingent and in the future so far neither definitely has
happened nor definitely has not happened, even though in either case,
whether one is considering the past or the future, one may not know
which alternative eventually will turn out to be the case.