I use the term ‘redundancy’ in the general sense in which any analyzable linguistic function may be performed more than once in an utterance, and may also be repeated in subsequent utterances. The rules of redundancy are probably different for speech as compared with writing, different within oral literature as compared with written, and different for monologue as compared with dialogue.
- Le Page (1977), Pag. 230

Redundancy in phonology occurs when more than one distinct feature is involved in phonemic contrast. In the contact situation this may allow for 'partial' recognition and identification by each party recognizing (a) one of the two or three distinctive features involved, (b) the phonotactic rules, and (c) the semantic probabilities.
- Le Page (1977), Pag. 230