A father talks to his daughter who is a bit upset because her desk is untidy.
“What makes it untidy?” he asks.
“Well when things are moved about.” she replies.
“So if I move this pen a bit does that make it untidy?”
“Yes it does” she says “the pen has to be just there.”
“Well the problem is” says her father “there are a lot of ways you can see your desk as untidy but only one way you can see it as tidy!”