What Stays and What Moves

A short essay on a single idea about how to tell the real from the relative There is a move so simple it sounds almost like nothing: hold everything fixed but one thing, change that one thing, and watch what happens. What stays the same across the change is stable under that test — and stable things have a claim on being treated as real. What moves is relative to where you’re standing. That’s the whole idea. Everything else is working out its consequences. The Problem It Solves We get confused, constantly, between two kinds of disagreement. The first kind: two people measuring the same mountain from different sides and getting different numbers. The second kind: two people looking at the same optical illusion and seeing different things because that’s how the illusion works. The confusion between these cases is not merely academic. If you treat the first kind of disagreement as if it were the second, you stop trying to resolve it and call it a matter of perspective. If you treat the…