The elevator in my building has a door-close button that does nothing. I learned this the way everyone learns it, which is to say I pressed it for years under the impression that it was speeding up my departure. The button lights up. It makes a small click when pressed. It provides every sensory signal of function. What it does not do is close the door any faster than the door was going to close on its own. The elevators in most American buildings installed since 1990 have door-close buttons wired to nothing, because the Americans with Disabilities Act requires the door to stay open long enough for a person using a wheelchair or walker to enter, and the button that overrides that requirement is accessible only to the fire department with a key.

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