In my personal view, there is no need stating all the facts and materials in the powerpoint. Besides, you have to add some new ideas during the presentation. Remember that the audience will be tired listening to you read all the stuff in the powerpoint. Since there is no necessity of a presenter, if you read according to the powerpoint. What the audience have to do is just copy your powerpoint and then just go home and study by themselves. Literally, the stuff in the power point should be brief and short. And the presenter should give the audience his or her personal understanding of the text in order that the audiencewill more easily get across the material you are presenting.