Committing someone to a mental health facility against their will is never an easy thing to do. But if they're truly ill, then they need to get help. If it turns out that they weren't ill, then you can have faith that the doctors will eventually figure it out and release them...right?
Well, if the results of this 1973 experiment are to be believed, I wouldn't count on it.
After the results of this study became public, a disgruntled hospital administrator maintained that these sorts of mistakes could never happen at his hospital and challenged Rosenhan to test him.