14. The method of claim 1 further comprising, using downward inference to determine the preference of the user for an unscored concept represented by the unscored node using the scored node using the addition of a constant value, β, to the score of the scored node, if the unscored node represents a more specific concept than the concept represented by the scored node.
14. The method of claim 1 further comprising, using downward inference to determine the preference of the user for an unscored concept represented by the unscored node using the scored node using the addition of a constant value, β, to the score of the scored node, if the unscored node represents a more specific concept than the concept represented by the scored node. 15. The method of claim 14 wherein the downward inference is calculated by S(y|x)=S(x)+β.