1. A method of answering questions in an information handling system comprising a processor and a memory, the method comprising: ingesting, by the system, a first set of sources into a first corpus; ingesting, by the system, 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, by the system, a question from a requestor; identifying, by the system, 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, by the system, 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, by the system, 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.