1. A computer-implemented method, comprising: receiving a recommendation of a person from an expertise discovery function executed on a processor-based device that generates the recommendation in accordance with an inference of a level of expertise from a plurality of usage behaviors; and receiving an explanation from a computer-implemented explanatory function, wherein the explanation comprises a reason as to why the person was recommended.
1. A computer-implemented method, comprising: receiving a recommendation of a person from an expertise discovery function executed on a processor-based device that generates the recommendation in accordance with an inference of a level of expertise from a plurality of usage behaviors; and receiving an explanation from a computer-implemented explanatory function, wherein the explanation comprises a reason as to why the person was recommended. 4. The method of claim 1 , further comprising: receiving the recommendation from the expertise discovery function executed on a processor-based device that generates the recommendation in accordance with the inference of a level of expertise from a plurality of usage behaviors, wherein at least one behavior of the plurality of behaviors is a physical location.