8. A computing device comprising: memory; a processor coupled to the memory and via which the computing device selects a common-sense problem from a first source, where the common-sense problem cannot be reliably answered by computers; an input device coupled to the processor and via which the computing device receives answers to the common-sense problem from a second source; the processor via which the computing device identifies any of the received answers that are arbitrary answers; the processor via which the computing device removes the identified arbitrary answers from the received answers; and the processor via which the computing device designates as final answers, in response to the identified arbitrary answers being removed from the received answers, any remaining received answers.
12. The computing device of claim 8 where the second source comprises at least one human.