 Appeals to domain restriction are not limited to normalcy-based approaches. In light of generics such as “ducks lay eggs”, some theorists have argued that generics involve quantification over relevant individuals (actual or possible), where context determines which individuals are relevant (e.g., Schubert and Pelletier 1987; Declerk 1991; Chierchia 1995). On such views, when we consider a generic such as “ducks lay eggs”, only the mature, fertile female ducks enter into our evaluation of the sentence, because, e.g., they are the only potential egg-layers. The question that arises is how exactly to determine which individuals are relevant. Schubert and Pelletier (1987) offer a detailed discussion of how some of these restrictions arise—e.g., via presupposition, focus, linguistic context, or explicit restriction as appropriate.