A mental model is not just a tool for thinking — it's also a commitment to what you'll stop noticing. Alfred Korzybski, the Polish-American linguist who founded General Semantics in the 1930s, made this precise: he called it 'semantic reaction' — the automatic, pre-conscious firing of a habitual interpretation before you've had a chance to actually look. His famous phrase 'the map is not the territory' is usually read as a call for humility. But the sharper edge of it is this: every map you carry not only simplifies the territory, it trains your eye to skip the features the map doesn't include. The model doesn't just explain reality — it curates it. For leaders and innovators especially, this matters because the mental models that got you competent are the same ones that will make you confidently wrong. Korzybski's practical prescription was 'indexing' — the habit of tagging every judgment with what it's based on: not 'this person is resistant' but 'this person, in this meeting, on this topic.' It's a small discipline. But it's the difference between a map that guides you and one that blinds you to the road you're actually on.

Pick a mental model you rely on most at work. What category of evidence does it structurally prevent you from taking seriously?

Drawing from General Semantics — Alfred Korzybski (Science and Sanity, 1933)