The Overtones of Harmony

I think you could say that an octave is harmony, because it's tiny way two different pitches, but it's the same note. Neither you nor anyone on the planet knows what an overtone is. It's not real. I know what an undertone is. Everyone knows what an under... What is it? Socially. The undertones was also an acapella group at my school. We had one called deceptive cadence. All alcohol acapella. There's a reverse osmosis that I was like, wow. That's pretty good. You take bad water and make it good. This is not my area of expertise. A polymer is a chain of mon