The layman's term for the theory which states that once an idea has been simplified to the point where a strong opinion can be formed about it, that it has then become simplified beyond use.

This theory is most (IMHO) true in philosophy, and politics, where there are so many ways of looking at things, and no sure way of knowing if you're right or wrong; and most poetically just when used, for example, upon math, and physics, because math and physics are built around simplicity (and just why it's poetically just I'll leave as an exercise for the reader).