Original sentence: Bernard, on the other hand, has argued that an orthography is preferable because most issues of ambiguity never arise to native peakers who are usually capapble of disambiguating through context, and who are also often unconscious of the significance of intonation in their language and consequently have a hard time learning to apply the tone diacritics correctly.Doris Bartholomew is a leading advocate for the indication of tone, she argues that since tone is an integrated part of the languages grammatical and lexical systems tone must be indicated to avoid ambiguity
Edited sentence: Bernard (1980), on the other hand, has argued that an orthography is preferable because most issues of ambiguity never arise to native peakers who are usually capapble of disambiguating through context, and who are also often unconscious of the significance of intonation in their language and consequently have a hard time learning to apply the tone diacritics correctly.Doris Bartholomew (1968) has been a leading advocate for the indication of tone, arguing that since tone is an integrated part of the languages grammatical and lexical systems tone must be indicated to avoid ambiguity