 It is important to notice that neither the perceptual content of seeing the facing surface of an apple, nor the belief content of believing that the colorless, odorless liquid called ‘water’ is wet, is completely narrow. We can find still more remote possibilities in which the subject’s perceptual or belief state is exactly the same, but he or she does not have this perceptual or belief content. (The “apple” could be a wax imitation or a holographic projection; Oscar’s Twin could live in an environment in which the word ‘liquid’ refers to very finely granulated solids.) To find truly narrow contents we will need to press our subtraction strategy still further, and appeal to objects that are very different from the ordinary objects of perception or belief — perhaps colored shapes or sense-data in the case of perception; perhaps beliefs about the subject’s perceptual inputs and behavioral outputs in the case of belief (cf. McDermott 1986).