Beginning of Essay
1.1 The concept of deictic centre Deixis deals with the words and expressions whose reference relies entirely on the circumstances of the utterance. For that reason these special expressions and their meaning in discourse can only be understood in light of the ....

Middle of Essay
.... there are certain situations making an interpretation difficult or even impossible, mostly when we only get chunks of information and therefore lack context. If, for example, a person tells a story and forgets to give the essential information a deictic term refers to, we will grow aware of the weakness the deictic system features. Or if the fax machine just receives the second page of a letter, beginning with "Then he was quite embarrassed about it " - the adressee will never be able to guess what "then", "he" and "it" stands for. Similar gaps arise if we read about an utterance made in the past and lack information about the references. ....