11. A method comprising performing, by a processor ( 100 ), inference over a semantic network ( 106 ), wherein the inference is responsive to a link ( 106 ) having been omitted from an index ( 113 ) associated with a node ( 105 ) referenced by the link in the semantic network.
11. A method comprising performing, by a processor ( 100 ), inference over a semantic network ( 106 ), wherein the inference is responsive to a link ( 106 ) having been omitted from an index ( 113 ) associated with a node ( 105 ) referenced by the link in the semantic network. 14. The method of claim 11 , wherein the inference system evaluates a goal starting from a constant in an argument position from which links have not been dropped from the applicable index in response to the goal having such an argument position.