From using words to overthrowing regimes, shared awareness is necessary for people to coordinate. The cognitive scientist explains to Nature how it works. When Everyone Knows That Everyone Knows...: ...

In Ross v. U.S., decided last month by the D.C. Court of Appeals, defendant had left her dog Cinnamon for over an hour in a parked car on a hot day (98 F) with the windows cracked open. (There was ...