[rules-dev] Reasoning with Uncertainty

I looked at the W3 site to see just what "Reasoning with Uncertainty" entails according to W3C - I never did find any detail. Is it fuzzy logic or rules with uncertainty ?? "NON ILLEGITAMATES CARBORUNDUM" ....God grant me... The senility to forget the people I never liked The good fortune to run into the ones that I do And the eyesight to tell the difference."