Murphy's Law is typically rendered as "If anything can go wrong, it will." The idea is to design things so that they can't go wrong. But, as we know, Murphy's Law is optimistic. It implies that you can identify things that might go wrong with your design and correct them before they do.
The Law of Inevitable Failure is not so optimistic. It states emphatically that things will go wrong anyway. That is, "If anything just cannot go wrong, it will anyway."
