1) Coreference 2) Reflexivity 1) Reflexivity 
Reflexiveness is one of Charles Hockett`s 16 Design features of language which states that in a language the speaker can use his/her language to talk about language. Speakers of a language are able to have knowledge about their language and be able to reflect upon it. ...
The possibility of using language to talk about language; this is one of its delimiting characteristics with respect to other communication systems.