By Alistair Scott. I have used AZZ Cardfile to sort out my collection of Murphy's Laws.

These are laws of the Universe which are familiar to everybody, but are never studied formally. Nor are they mentioned in textbooks of physics, engineering, medicine, psychology, etc.

Scientists, publicly, will state that these laws don't exist, are a load of rubbish, are unprovable ... that they are a lot of nonsense. But secretly they believe in them just as much as anyone else.