Dennett: Real magic, in other words, refers to the magic that is not real, while the magic that is real, that can actually be done, is not real magic.

That's the same quirk in natural language by which a heavy drinker is not usually a drinker who weighs a lot. (<Adjective> <noun> can mean ‘a <noun> who/which is <adjective>’, or ‘someone/something who/which is <adjective>ly a <noun>’.)