 An appeal to functional norms can be combined with a variety of other ideas about content-determination. For example, there can be both isomorphic and informational versions of teleosemantics. In the former case, the proposal might be that the relevant isomorphism is one that cognitive systems are supposed to exploit. In the latter case, the theory might say that mental content depends on the information carrying, storing or processing functions of mechanisms. (The relevant notion of information is variously defined but, roughly speaking, a type of state or event is said to carry information about some other state or event when it is caused by it or reliably co-occurs with it.