If you ask a large group of people a question, to which only some of them know the right answer, how can you use their responses to find the truth? A new paper in Nature describes a method that the authors show works really well.
The paper is called:
Prelec, D., H. S. Seung, and J. McCoy. 2017. A solution to the single-question crowd wisdom problem. Nature. DOI: 10.1038/nature21054.
Puzzle 29 is called “Rolling a Six.”