The map is not the territory — a principle Alfred Korzybski introduced in the 1930s that remains one of the most practically powerful mental models you can carry. Every framework you use to understand a situation (your org chart, your budget forecast, your read on a colleague) is a simplification, and simplifications always leave something out. The danger isn't using maps — you can't function without them — it's forgetting you're holding one. The next time a plan breaks down unexpectedly, before asking 'what went wrong?', ask first: 'what did my model of this situation simply not include?'

Which mental model do you currently rely on most — and what kind of evidence would actually cause you to revise or abandon it?

Drawing from General Semantics / Systems Thinking — Alfred Korzybski