Some philosophers have, in the past, leaped from this sort of consideration to what they take to be a proof that the mind is essentially non-physical in nature. The argument is simple; what we said about the ant’s curve applies to any physical object. No physical object can, in itself, refer to one thing rather than to another; nevertheless, thoughts in the mind obviously do succeed in referring to one thing rather than another. So thoughts (and hence the mind) are of an essentially different nature than physical objects. Thoughts have the characteristic of intentionality- they can refer to something else; nothing physical has ‘intentionality’, save as that intentionality is derivative from some employment of that physical thing by a mind. Or so it is claimed. This is too quick; just postulating mysterious powers of mind solves nothing. But the problem is very real. How is intentionality, reference, possible?