Business English: A Practice Book by Rose Buhlig

6. In talking, follow the plan explained in Exercise 140, being

especially careful in conclusion to summarize the proofs that you have presented. * * * * * The conclusions that you reach in your arguments must be based upon statements that are true. In the following, some of the statements are false, and therefore the conclusions based upon them are false. Point out wherein the falsity consists. In others of the following, irrelevant matter has been introduced. Point it out, explaining why it is irrelevant.