dissertation should present a clear and cogently expressed argument.
paragraphs and sentences do more than assist smooth prose: they sharpen
and clarify the argument.
the argument of an eminent scholar is not evidence — you should explain
why you believe one scholar's analysis is better than another’s.
materials (examples, quotations, illustrations, etc) as evidence,
explaining their significance.
from your material rather than use it to illustrate a point or argument.
conclusion is essential to a good piece of writing. It should summarise
the argument and, possibly, make suggestions for further research.