Welcome to your Public Speaking 02 (Ethics)

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What would you do? Ethics short answer two (2)
While researching your persuasive speech, you find a quotation from an article by a highly respected expert that will nail down one of your most important points. But as you read the rest of the article, you realize that the author does not in fact support the policy you are advocating. Do you still include the quotation in your speech? Why or why not?
How many guidelines are there for ethical speaking according to The Art of Public Speaking?
What is the most serious ethical lapse a public speaker can make?
What would you do? Ethics short answer one (1)
You are speaking on the topic of prison reform. In your research, you run across two (2) public opinion polls. One of them, an independent survey by the Gallup Organization, shows that a majority of people in your state oppose your position. The other poll, suspect in its methods and conducted by a partisan organization, says a majority of people in your state support your position. Which poll do you cite in your speech? If you cite the second poll, do you point out its shortcomings?
What would you do? Ethics short answer three (3)
When listening to an informative speech by one of your classmates, you realize that much of it is plagiarized from a Web site you visited a couple of weeks earlier. What do you do? Do you say something when your instructor asks for comments about the speech? Do you mention your concern to the instructor after class? Do you talk with the speaker? Do you remain silent?