So... the proper approach to conversation about serious matters is to harp on someone for using terminology you don't like even though its blatantly obvious from context what they mean?

And honestly, I only ceded the point about the terminology because I thought it would prompt you to finally make your on-topic point. "Fluctuation" can certainly mean "movement from low to high" without being in error - read your own definition. I guess you really don't have anything to contribute, though.