3. The method of claim 2 , wherein the one or more supporting evidence measure knowledge values comprises a fuzzy logic truth supporting evidence value indicative of an amount of supporting evidence that an atomic logic term of a corresponding node is true/met, and a fuzzy logic falsity supporting evidence value indicative of an amount of supporting evidence that the atomic logic term is false/not met.
3. The method of claim 2 , wherein the one or more supporting evidence measure knowledge values comprises a fuzzy logic truth supporting evidence value indicative of an amount of supporting evidence that an atomic logic term of a corresponding node is true/met, and a fuzzy logic falsity supporting evidence value indicative of an amount of supporting evidence that the atomic logic term is false/not met. 6. The method of claim 3 , wherein propagating the at least one knowledge value of at least a subset of the nodes in the logical parse hierarchical representation to one or more other nodes in the logical parse hierarchical representation based on propagation rules comprises, for an OR logical operator node in the hierarchical representation: propagating downward, in the hierarchical representation, a falsity supporting evidence value of the at least one knowledge value of a parent node to child nodes of the OR logical operator node and not propagating a truth supporting evidence value of the parent node to the child nodes of the OR logical operator; propagating upward, in the hierarchical representation, a maximum truth supporting evidence value and a minimum falsity supporting evidence value, of the child nodes of the OR logical operator, to the parent node; and propagating sideways, to sibling nodes in the hierarchical representation, a product of a source node's falsity supporting evidence value and the parent node's truth supporting evidence value as a truth supporting evidence value for the sibling node.