Abstract. Friedrich von Hayek’s The Sensory Order (1952) presents a physicalist identity theory of the human mind. In a reaction to Karl Popper’s criticism that such a “causal ” theory of the mind cannot explain the descriptive and critical-argumentative functions of language, Hayek wrote a paper that was never published. It contains the description of a thought experiment of two communicating automata. This paper confirms the impression of the AI-like character of the structuralism and functionalism of Hayek’s Sensory Order. In some important respects, what Hayek tries to do in his paper is similar to Turing’s discussion of the question “can machines think? ” Arguments will be given why according to a functionalist and physicalist identity...