Dembski claims that the term is well-defined, and together with an estimate for its value, that the occurrence of certain kinds of events whose probability lies below this value can be rejected, given the resources available in the entire history of the universe.
Dembski claims that the term is well-defined and he provides a (lower-bound) estimate for its value. Well-definedness of the term would imply that the occurrence of certain kinds of events whose probability lies below this value can be rejected, given the resources available in the entire history of the universe.