Computer scientists created an app called Dialog Den which will soon be released open source. They recruited people online and then had them use the app to face a selection task together in a way that allowed them to argue, deliberate and share their reasoning alone. In half of the groups that got the right answer, no one had the right answer before the group discussion. If you find this as fascinating as I do, there's a link in the show notes over at youronautsosmart.com if you would like to see the actual transcripts of their deliberation.