[MrEldritch]

This is true! I was trying to simplify things a bit for a basic explanation, but I fear I oversimplified. I just meant that the generally used math breaks down; if you're aware of the problem, you can correct for it, but very often people don't.

[ncmncm]

Stating it more plainly, what you wrote was incorrect, and unfairly tarred a statement that was, in fact, correct.