Proposes that a non-conscious agent can mimic a conscious one, making experimental verification of private experiences impossible.
Abstract
That we cannot experimentally verify that another being or a machine has private experiences is intuitively obvious. I propose a framework and a set of assumptions that allow us to state this precisely and prove it. The proof is straightforward: A not-conscious agent can mimic a conscious one. I rely on the presence of noise in the universe (so that communication can be assumed digital), and the key assumption that to be conscious an agent must be at least as powerful as a universal Turing machine.