 Relativity: If a theory of observability determines what is observable, and empirical adequacy is assessed in terms of what is observable, then a theory of observability can name the terms of its own empirical adequacy. Empirical adequacy becomes radically relative. With no objective, theory-independent constraints on empirical adequacy, it’s “anything goes” when it comes to theory acceptance: one simply adopts the theory of observability that underwrites the empirical adequacy of whichever theory one is interested in accepting.