probabilities require ‘all possible outcomes’ of
an uncertain event and each of their individual probabilities to be
known, they can only be defined for ‘bounded uncertainties’. If
probabilities cannot be quantified in any undisputed way, we often
can still qualify the available body of evidence for the possibility
of various outcomes in terms of plausibility or convincingness of
the evidence (e.g. Weiss
/media/loftslag/Refsgaard_etal-2007-Uncertainty-EMS.pdf