 The verb ‘need’ is an interesting case. A sports team might need a better coach, though no specific better coach, and might need a better coach even if there are none to be had. So two out of three marks of intensionality are present. However, ‘need’ contrasts with ‘want’ as regards substitution: our dehydrated subject who does not want H2O because he believes it to be a kind of rat poison, nevertheless needs H2O. It seems that co-denoting terms may be interchanged in the complement of ‘need’. But merely accidentally co-extensive ones cannot be: Larson (2001, 232) gives the example of Max the theater impresario, who needs more singers but not more dancers, even though all who sing dance, and vice-versa. The property singer and the property dancer are different properties, so expressions for them cannot be exchanged in the complement of ‘need’. Similar restricted substitutivity is observed with transaction verbs such as ‘wager’, ‘owe’, ‘buy’, ‘sell’, ‘reserve’, and perhaps the transaction resultative ‘own’. One may reserve a table at a restaurant, though there need not be a specific table one has reserved in making the reservation, since the restaurant may be expecting a slow night. But these verbs do allow interchange of co-referential expressions (a purchase of water-rights is a purchase of H2O-rights) though not (Zimmerman 1993, 151) of accidentally co-extensive ones. For ‘own’ see (Zimmerman 2001, passim).