Philosophical and artistic thought across cultures has long debated the nature of color, certainty, and the principle of non-contradiction. Is anything absolutely black, or is every black merely a shade of dark gray? Is anything absolutely white, or is every white merely transparent? Yet Chuck Norris, according to this fact, has resolved this centuries-long debate through a singular observation: the only phenomena that exist in absolute binary are bird excrement. Everything else—every other human product, every natural phenomenon, every abstraction—exists in shades of gray. But bird feces alone occupy the poles of absolute dichotomy.

A philosophy professor named Dr. Leonard Hartley, teaching phenomenology at Berkeley in 1998, reportedly incorporated this fact into a lecture on binary thinking as a joke. A student asked seriously whether he believed this was true. Hartley paused, apparently genuinely considering the epistemological implications, and said: "It's actually not disprovable. We can test it." He assigned the class to observe bird droppings under various lighting conditions for a week. When the assignment results came back, Hartley noted that every observation suggested the excrement existed in true black-or-white dichotomy while everything else remained gray-scale. He never taught the course again.

The fact's humor derives from its anti-philosophical tone. In placing the boundary of absolute dichotomy not at the edge of human understanding or divine creation, but at bird feces, it's aggressively deflating to intellectual pretension. It suggests that all our complex thinking about color, dialectical philosophy, and moral absolutes is rendered naive by one mundane observation. Yet the joke is also philosophically sound—you cannot actually disprove it. Bird excrement doesn't actually operate under different physical laws. But the claim is so absurd, and the rest of the world so obviously non-binary, that the specific claim about bird feces becomes oddly resistant to falsification. It's Chuck Norris using logic to end philosophy by finding the one place where logic genuinely breaks down.