6. The method of claim 5 , wherein identifying, for each uncertain response, at least two possible answers to the query comprises consulting an interactive decision tree, wherein the interactive decision tree is a graphical representation of at least a portion of a knowledge base related to the unit or units, and wherein the graphical representation includes branches containing multiple answers to each question related to the query.
5. The method of claim 1 , wherein identifying one or more possible answers to the requester comprises identifying, for each uncertain response, at least two possible answers to the query.