An official website of the United States government
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A
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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Flow diagram for the question with confirmation CCA. This CCA asks the user for an explicit confirmation of the answer if the confidence of the answer recognition is below a given threshold.