13. A computer program product stored in a computer readable storage medium, comprising computer program code that, when executed by an information handling system, causes the information handling system to perform actions comprising: selecting a document that has been ingested by a question answering (QA) system; identifying a correction to the selected document from one or more correction sources, wherein the identifying comprises: identifying a possible correction by comparing a first statement in the selected document with a second statement from a correction source, wherein the first and second statements each pertain to a same lexical answer type (LAT) and focus; evaluating, by the QA system, the first statement and the second statement; and determining that the second statement is more correct than the first statement in response to the evaluation; and applying the correction to the selected document within the QA system by replacing the first statement with the second statement, wherein the selected document is part of a knowledge base utilized by the QA system to answer questions.
13. A computer program product stored in a computer readable storage medium, comprising computer program code that, when executed by an information handling system, causes the information handling system to perform actions comprising: selecting a document that has been ingested by a question answering (QA) system; identifying a correction to the selected document from one or more correction sources, wherein the identifying comprises: identifying a possible correction by comparing a first statement in the selected document with a second statement from a correction source, wherein the first and second statements each pertain to a same lexical answer type (LAT) and focus; evaluating, by the QA system, the first statement and the second statement; and determining that the second statement is more correct than the first statement in response to the evaluation; and applying the correction to the selected document within the QA system by replacing the first statement with the second statement, wherein the selected document is part of a knowledge base utilized by the QA system to answer questions. 17. The computer program product of claim 13 wherein the correction source is selected from the group consisting of a forum post, a new document, and an issued correction.