A journalist is writing an article about a mental hospital

A journalist is writing an article about a mental hospital

He asks the head doctor the following question.

'How do you establish whether a patient can leave the asylum?'

'Well, we have little exercises to establish their mental state. If they complete such exercises correctly, they're judged fit to leave.'

'Could you give me an example?'

'Sure. There's a bathtub full of water. There are three objects in the bathroom: a tea spoon, a glass and a bucket. What would you choose to get rid of the water from the tub?'

'Oh, that's easy. Every sane person would choose to use the bucket, surely.'

'No, every sane person would pull out the plug, actually...'