13. A computer program product for evaluating information confidence based on cognitive behavior indicators of a user, the computer program product comprising: a computer readable storage medium having program instructions embodied therewith, wherein the computer readable storage medium is not a transitory signal per se, the program instructions executable by a processor to cause the processor to perform a method comprising: determining a system generated answer to a question in an active learning question and answer system, wherein the system generated answer includes a first answer confidence score for the system generated answer; querying a user for an answer to the question in the active learning question and answer system based on the first answer confidence score; receiving information from the user as an answer to the question in the active learning question and answer system; monitoring the user for one or more cognitive behavior indicators detected by a sensor when the user is providing the information, wherein the one or more cognitive behavior indicators comprise one or more biometric measurements of the user at a time the information is provided by the user and measures of an influence of an external stimuli on the user at the time the information is provided by the user; determining a second answer confidence score for the information received from the user based on the one or more biometric measurements of the user and the measures of external stimuli on the user; annotating the information with the cognitive behavior indicators, a user profile associated with the user, and the second answer confidence score; and updating the first answer confidence score based at least in part on the second answer confidence score.
15. The computer program product of claim 13 , wherein the cognitive behavior indicator comprises one or more of user eye tracking, user typing speed, user heart rate, user breathing rate, user blink frequency, user skin conductance, electroencephalogram information, user body temperature, user perspiration quantity, user blood pressure and user amount of time elapsed during information.