A result for a task may be provided in response to receiving a request from, for example, a user for the result. The request specifies a desired accuracy level for the result. The accuracy of the result is determined using the individual accuracies of one or more persons that have selected the result. Each person's individual accuracy is determined based on results for prior tasks previously performed by that person. The person's individual accuracy is proportional to the number of that person's prior results that are with a consensus of other persons that have performed the same prior task. The result is provided if the accuracy of the result is equal to or greater than the desired accuracy level.