For four hundred years, some of the greatest minds in human history could not figure out how to keep spectacles on a face. They tried hats, ribbons, wigs, handles, and nose bridges. The answer was sitting on the side of their head the entire time — free, available, perfectly shaped, completely ignored. In this episode, we trace why they missed it, what it reveals about how every business gets trapped staring at its product instead of watching its people, and what Andy Grove, IDEO, Kodak, and a pencil tucked behind an ear all have in common. The ear was always there. The question is whether your business is looking at it.