Backward chaining systems have certainty factors and other schemes for accumulating evidence or belief during inference. Does anybody know of a way for a forward chaining system to accumulate belief? Any papers or implementations I could look at? thanks, Allan -- View this message in context: http://n3.nabble.com/Accumulating-belief-while-reasoning-tp437912p437912.... Sent from the Drools - User mailing list archive at Nabble.com.