8. A system, comprising: one or more computer processors; and a memory containing a program, which when executed by the one or more computer processors, performs an operation comprising: receiving, by a question answering system, a case from a user; assigning a first level of user sophistication, of a plurality of levels of user sophistication, to the user; determining a level of evidence sophistication, of a plurality of levels of evidence sophistication, associated with each of a plurality of items of supporting evidence in a corpus of information used to process the case; selecting a subset of the plurality of items of supporting evidence based on the determined levels of user sophistication and evidence sophistication; and returning the selected subset to the user as part of a response to the case.
8. A system, comprising: one or more computer processors; and a memory containing a program, which when executed by the one or more computer processors, performs an operation comprising: receiving, by a question answering system, a case from a user; assigning a first level of user sophistication, of a plurality of levels of user sophistication, to the user; determining a level of evidence sophistication, of a plurality of levels of evidence sophistication, associated with each of a plurality of items of supporting evidence in a corpus of information used to process the case; selecting a subset of the plurality of items of supporting evidence based on the determined levels of user sophistication and evidence sophistication; and returning the selected subset to the user as part of a response to the case. 13. The system of claim 8 , wherein a first item of supporting evidence is not selected as part of the subset, the operation further comprising: modifying at least one term in the first item of supporting evidence based on the first level of user sophistication of the user; and returning the modified first item of supporting evidence to the user as part of the response to the case.