Placebo buttons Posted by mathattack on Sunday August 04, 2013 @12:20AM from the youarenotsosmart.com dept. http://youarenotsosmart.com/2010/02/10/placebo-buttons/?utm_source=dlvr.it&utm_medium=twitter ( 1 comment | 4 points | on HN )
"close buttons don’t close the elevator doors in many elevators built in the United States since the 1990s"