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The Art and Craft of Persuasion. Based upon: Moser, Joyce, and Ann Watters, ed. Creating America: Reading and Writing Arguments, 3 rd Ed. New Jersey:Prentice Hall, 2002. Types of Appeals. Ethos Based upon shared values and beliefs Ex. FDR, Pearl Harbor, and “fair play” Pathos
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The Art and Craft of Persuasion Based upon: Moser, Joyce, and Ann Watters, ed. Creating America: Reading and Writing Arguments, 3rd Ed. New Jersey:Prentice Hall, 2002.
Types of Appeals • Ethos • Based upon shared values and beliefs • Ex. FDR, Pearl Harbor, and “fair play” • Pathos • Manipulates audience emotions • Empathy • Logos • Logic and reason • Induction and Deduction
Inductive Reasoning • Generalize truth from number of observations • MLK: “boy,” motel, playground • Faults • Inadequate evidence • Faulty conclusion • “leap of faith”
Deductive Reasoning • Begins with general principle and makes assertion based upon it • Syllogism • Enthymeme
Syllogism • Major Premise + Minor Premise = Conclusion • Major Premise: All men are mortal • Minor Premise: Socrates is a man • Conclusion: Socrates is mortal
Enthymeme • Assumes common knowledge • Compresses syllogism • “Socrates, being a man, is mortal.”
Errors in Logic • Hasty Generalization • Conclusion based upon too few example • Two senators are millionaires, therefore all public officials are rich. • Biased Sampling • Examples drawn from a pool guaranteed to produce a certain conclusion
Errors in Logic continued • Straw Man • False Target • Misstates opponents views • False Analogy • Suggests that two people/events are identical rather than similar • Attacks the analogy rather than the issue
Errors in Logic continued • Ad Hominem • Attacks against individual holding the position rather than the position itself • “If I am young and right, what does age matter.” –Sophocles Antigone • Post hoc ergo propter hoc • “After this, therefore because of this” • Correlation equals causation
Errors in Logic continued • False Dilemma • Either-or situation • Boils down to only two choices • Slippery Slope • First step inevitably leads to disaster • Begging the question • Assuming something as a given that hasn’t been proven
Errors in Logic continued • Non Sequitor • Placing two things next to each other to imply connection without providing any logical backing