Here's a strange thing about maps: the better they are, the more dangerous they become. A crude sketch reminds you it's just a sketch — but a beautifully detailed map tempts you to forget the territory exists at all. Psychologist Philip Johnson-Laird spent decades studying how the mind builds internal 'mental models' of the world, and his core finding was quietly unsettling: we don't reason from logic, we reason from these internal simulations — and then convince ourselves we've been logical. The Pragmatist philosopher William James made a similar point a century earlier: an idea isn't true because it corresponds to reality, it's true because it *works* — which means the moment a mental model stops working, loyalty to it is the real enemy of clear thinking. Today, when you notice yourself certain about something, try a small experiment: ask not 'is this model correct?' but 'what would have to be true for this model to be wrong?'

Which mental model do you rely on most heavily — and when did you last actually test it against reality, rather than just confirm it?

Drawing from Pragmatism — William James