Semantics is viewed within linguistics as being at one end of the linguistic model, with phonetics at the other end and grammar in the middle. This view is plausible because semantics deals with meaning, phonetics deals with sounds, and grammar deals with structure. Unlike phonetics, semantics cannot be directly observed or empirically verified since the meaning of language cannot be identified independently of language itself. Linguistics aims to study generalizations rather than specific instances, and semantics must be concerned with the meaning of sentences as abstract linguistic objects rather than utterances by individuals.