From The Elements of Style, William Strunk, Jr., Via Bartleby.com
Make definite assertions. Avoid tame, colorless, hesitating, non-committal language. Use the word not as a means of denial or in antithesis, never as a means of evasion.
|He was not very often on time.||He usually came late.|
|He did not think that studying Latin was much use.||He thought the study of Latin useless.|
|The Taming of the Shrew is rather weak in spots. Shakespeare does not portray Katharine as a very admirable character, nor does Bianca remain long in memory as an important character in Shakespeare’s works.||The women in The Taming of the Shrew are unattractive. Katharine is disagreeable, Bianca insignificant.|
The last example, before correction, is indefinite as well as negative. The corrected version, consequently, is simply a guess at the writer’s intention.
All three examples show the weakness inherent in the word not. Consciously or unconsciously, the reader is dissatisfied with being told only what is not; he wishes to be told what is. Hence, as a rule, it is better to express a negative in positive form.
|did not remember||forgot|
|did not pay any attention to||ignored|
|did not have much confidence in||distrusted|