Philosophers often remind us, and each other, that mental contents have the property of ‘aboutness’. Indeed, this is their distinguishing feature. Perceptions, thoughts, beliefs, desires, and hopes, are all about things, events, states of affairs, past, present or future, actual or possible. So far, so obvious. Or so it should be. Nevertheless, this aboutness – or to use the philosophers’ preferred term, intentionality – has generated a vast literature in the philosophy of mind, and has been the subject of heated debate, just because it lies at the root of the fundamental differences between the mental and the physical. It makes mind difficult to fit into the cosmos as seen through what Daniel Dennett (in Consciousness Explained, 1991) called ‘the prevailing wisdom’ that “We can (in principle!) account for every…
