Insight has a half-life, and most people never measure it. The Confucian philosopher Xunzi — writing in the third century BCE, and often eclipsed by Mencius in Western curricula — argued that the deepest form of human error isn't ignorance but what he called 'bi': the obscuring of the mind by a partial view that has calcified into certainty. You encountered something true, held it, and then stopped updating. The insight didn't decay; it just stopped being checked against the world. In finance, this is the specific mechanism behind holding a thesis long after the conditions that generated it have dissolved — not because you're irrational, but because a past clarity is indistinguishable, from the inside, from present clarity. Xunzi's remedy wasn't skepticism or humility as a posture. It was deliberate re-exposure: returning the mind to the raw phenomenon, not the interpretation. On a Saturday, before next week's market noise fills the frame, pick one insight that is currently doing real work in your portfolio or your thinking — one thing you 'know' — and ask not whether it's still true, but when you last actually looked at the evidence underneath it, rather than the conclusion sitting on top.

What is one thing you currently 'know' about a market, a position, or a financial pattern — and when did you last touch the evidence that created that knowing, not just the conclusion you drew from it?

Drawing from Confucian Philosophy (Xunzian epistemology) — Xunzi (Xunzi, c. 235 BCE)