6. The information handling system of claim 1 wherein the actions further comprise: ingesting, into the first corpus, a first set of one or more passages from a first source selected from the first set of sources; and identifying a second set of one or more passages from a second source selected from the second set of sources, wherein the identification is based on the second set of passages being an update to the first set of passages and the second source being the same as the first source.
1. An information handling system that serves as a question and answering (QA) system, the system comprising: one or more processors; a memory coupled to at least one of the processors; a network adapter that connects the information handling system to a computer network; and a set of instructions stored in the memory and executed by at least one of the processors, wherein the set of instructions perform actions of: ingesting a first set of sources into a first corpus; ingesting a second set of sources into a second corpus, wherein the second set of sources are a subset of the first set of sources, and wherein the second set of sources include updates to the first set of sources; receiving a question from a requestor; identifying a plurality of candidate answers to the question using one or more sources included in the first and second corpuses, wherein a weighting is associated with each of the candidate answers; determining whether the first and second corpuses have an overlapping source from which two or more of the candidate answers were identified; in response to determining the overlapping source, assigning a first candidate answer from the overlapping source in the first corpus with a lower weighting than a second candidate answer from the overlapping source in the second corpus; selecting one or more likely answers from the plurality of candidate answers, wherein the selecting is based on the weighting associated with the respective candidate answers; and returning the selected likely answers to the requestor.