2. The method of claim 1 , further comprising: analyzing a second candidate answer in generating a response to the first case upon determining that the second candidate answer has the first feature.
1. A method to reduce an amount of processing required to generate a response to a first case by a question answering system, the method comprising: determining that a similarity score, of the first case relative to a second case, exceeds a similarity threshold; identifying, by operation of one or more computer processors, a first feature of the second case having a first relevance score exceeding a relevance threshold, wherein the relevance score indicates that the first feature is relevant in generating a correct response to the second case; determining, based on the similarity score and the first relevance score, that the first feature is relevant in generating a correct response to the first case; identifying a first candidate answer for the first case that does not have the first feature; and refraining from analyzing the first candidate answer in generating the response to the first case, thereby reducing the amount of processing of the question answering system.