Xunzi, the third great Confucian thinker, argued that human judgment is corrupted not by ignorance but by *bi* — a kind of cognitive obstruction where one partial truth blocks the view of every other truth. You're not wrong about what you see; you're wrong about what you're missing. This maps onto a precise failure mode in decision theory: when we evaluate options, we don't suffer from a shortage of reasons — we suffer from a surfeit of one reason that occludes the rest of the payoff landscape. The experienced negotiator, the seasoned trial attorney, the investor weighing a term sheet — each is vulnerable to the same trap: a single vivid consideration floods the frame and the expected value calculation quietly becomes a single-variable problem wearing the costume of a multi-variable one. Xunzi's remedy was deliberately sparse: before committing to a judgment, name what you are *not* currently looking at. Not to second-guess your conclusion — to audit the aperture itself.

In the last high-stakes decision you made, which single consideration dominated your reasoning — and what category of cost or consequence did you never assign a number to?

Drawing from Confucian Philosophy (Xunzi) — Xunzi (Xunzi: Basic Writings, c. 3rd century BCE)