Nobody can tell whether two computers are the same

And it’s screwing up both functionalist theories of consciousness and mechanistic interpretability. Hello! Today's post is a collaboration with Adrià Garriga-Alonso . It is a work in progress but we are posting it in its current state and welcome feedback while we continue to flesh it out. Here are two ways to build a machine which adds two numbers. Machine 1: is a calculator embedded in the wall…