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1 CSS/330: Critical Thinking and Computer Logic © 2004 University of Phoenix. University of Phoenix is a registered trademark of Apollo Group, Inc. in.

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Presentation on theme: "1 CSS/330: Critical Thinking and Computer Logic © 2004 University of Phoenix. University of Phoenix is a registered trademark of Apollo Group, Inc. in."— Presentation transcript:

1 1 CSS/330: Critical Thinking and Computer Logic © 2004 University of Phoenix. University of Phoenix is a registered trademark of Apollo Group, Inc. in the United States and/or other countries. (Week 2)

2 2 “The business executive is by profession a decision maker. Uncertainty is his opponent. Overcoming it is his mission.” —John McDonald

3 3 Strategies in Decision Making Week One: Week One:  Characteristics of Critical Thinking & Decision Making Week Two: Week Two:  Problem Identification & Formulation Week Three: Week Three:  Decision Making Week Four: Week Four:  Decision Implementation Week Five: Week Five:  Evaluation of Decision Outcomes & Processes

4 4 Critical Thinking Side step: –What are the components of Critical Thinking? –Think in terms of a inputs/process/outputs.

5 5 Components of Critical Thinking Perceptions (Ch. 1) Assumptions (Ch. 1) Emotions (Ch. 1) Language (Ch. 4) Arguments (Ch. 2, 8) Fallacies (Ch. 5, 6) Logic (Ch. 3, 9, 10) Problem Solving (Ch. 11, 12, 13) Book: Critical Thinking, A Student’s Introduction

6 6 Arguments Critical Thinking is concerned with recognizing, understanding, constructing, and critically evaluating arguments. So … What ’ s an Argument? –Also, what statements are Non-Arguments? –And, what statements are fallacious arguments?

7 7 Argument A claim defended with reason. –That something should be done (or not done) –That something is true (or false) –etc. It is not a “heated debate” debate”

8 8 Arguments All arguments follow a common structure or pattern: they are composed of one or more premises and a conclusion. Premise: a statement offered as evidence or reasons to support another statement (the conclusion) Conclusion: the statement in an argument that represents the claim we want to have others accept or believe.

9 9 Arguments The critical thinker should always strive to make clear and sound arguments. –Properly structured –All relevant premises are included –Conclusion is logically connected The critical thinker should also evaluate arguments presented to him/her with the same rigorous standards.

10 10 Argument Example Capital Punishment should be abolished because innocent people may be mistakenly executed. –Premise: Innocent people may be executed by mistake –Conclusion: Capital punishment should be avoided.

11 11 Arguments How to recognize Argument? –Look for Indicator Words –Conclusion IW: therefore, consequently, thus, hence, it follows that, etc. –Premise IW: because, since, for, as, given that, in as much, etc. –! Caution: These are generalities, not rules

12 12 Arguments Examples of IW in non arguments: –“I stepped on the brake because a dog ran in front of the car” –I ran into a tree with the car, hence the broken windshield

13 13 Non Arguments What types of statements are not an argument? –Reports Convey information on a subject –Unsupported assertions Indicate a belief without providing evidence –Conditional statements If A is true then B must be true –Illustrations Provide examples of a claim rather than evidence –Explanations Attempt to explain why rather than prove that “it is”. None of these statements tries to prove a claim

14 14 Non-Argument Examples Ford Mustangs come in a variety of colors and engine size including the powerful V8 Most people believe in God If it rains tomorrow, the parade will be cancelled Many wildflowers are edible. For example, daisies, and day lilies are delicious in salads Titanic sank because it struck an iceberg.

15 15 Logical Fallacy Fallacy: An argument that contains a mistake in reasoning Two major types –Fallacies of Relevance –Fallacies of Insufficient Evidence

16 16 Fallacy of Relevance Arguments in which the premises are logically irrelevant (not connected) to the conclusion A statement is relevant to another statement if it provides at least some reason for thinking that second statement is: – True (i.e. positively relevant) – False (i.e. negatively relevant) Otherwise, they are be irrelevant to each other.

17 17 Fallacies of Relevance Types Personal attack (Ad hominem) Attacking the motive Look who is talking (tu quoque) Two wrongs make a right Scare tactics Appeal to pity Bandwagon argument Straw man Red Herring Equivocation Begging the question

18 18 Fallacies of Insufficient Evidence Arguments in which the premises, though logically relevant to the conclusion, fail to provide sufficient evidence to support the conclusion.

19 19 Fallacies of Evidence Types Inappropriate appeal to authority Appeal to ignorance False alternatives Loaded question Questionable cause Hasty generalization Slippery slope Weak Analogy Inconsistency

20 20 Arguments…Non-Arguments…Fallacies…Questions?

21 21 Class Activity Let’s play Jeopardy. Name that fallacy (What is …) –Get into Teams –Identify the fallacies of relevance committed in the following passages. If no fallacy is committed, state “no fallacy.” –The team with the most correct answers wins.

22 22 Jeopardy 1. Paul was inebriated. It follows that he was drunk. 2. It would be unwise to appoint Pete Dobson as superintendent of schools. Mr. Dobson has twice been convicted of child endangerment and he was recently charged with embezzlement. 3. In a recent issue of Stogey magazine, Julio Fumar argues that Honduran cigars are better than Cuban cigars. But Fumar’s argument isn’t worth the paper it’s printed on. Fumar is biased against Cuba because the Castro regime imprisoned his parents. 4. Ricky Henderson, the Hall of Fame baseball player, stole many bases. Stealing is a crime. So, Ricky Henderson committed many crimes.

23 23 Jeopardy 5. Bruno: I’m sure that you will want to buy my company’s fire-detection system for your business. Sam: I don’t think so. One of your competitors offers the same level of protection for less money. Bruno: Well, as they say, it’s a free country. But before you make a final decision, keep this in mind: Every business that decided not to buy our system was very quickly plagued with fires and other acts of vandalism. 6. Tom: I can lick you. Huck: What makes you think you can lick me? Tom: Because I’m tougher than you are. Huck: What makes you think you’re tougher than I am? Tom: Because I can lick you. 7. Billy-Ray Hoggerty’s book Stoned in Muskogee should be awarded this year’s Pulitzer Prize for literature. Billy-Ray, as you know, recently lost both his parents, and his favorite coon-dog got run over by a hay-bailer. 8. Mom: Annie, did you break your brother’s model airplane? Annie: Well, he put chewing gum in my dolly’s hair.

24 24 Jeopardy 9.All the cool kids at Oaktree Elementary School drink Fizzy soda pop. So you should too. 10.Sneaker City has accused our company of exploitative labor practices. But Sneaker City’s labor practices are much more exploitative than ours are. I happen to know they regularly employ children as young as nine in their overseas factories. Clearly, these accusations are groundless. 11.Sandy Beach has argued for bilingual education. But who is Sandy Beach? Is she a trained educator? No, she’s a high school dropout who once served time for drug possession. Her argument, therefore, is worthless. 12.Dipsy O’Neill has recently argued that drinking a little red wine with dinner is good for one’s health. But no one should accept O’Neill’s argument. O’Neill, as you know, is the owner of O’Neill’s Wines and Spirits. Naturally she’d love to see people buy more wine.

25 25 Jeopardy 13.Police officer: Sir, if you don’t put your clothes on and stop screaming obscenities in public, I’ll be forced to arrest you for disorderly conduct. Drunk N. Disorderly: Blank you, you blankety-blank! Police officer: That does it. You’re going to jail. 14.In a recent judicial decision, District Court Judge Lemuel Featherstone argued that bazookas and flamethrowers are not protected by the Second Amendment. Apparently, Judge Featherstone believes that the U.S. Constitution is obsolete and should be repealed by judicial fiat. But the rights protected in the Constitution lie at the very core of America’s values and traditions. All true Americans must hope that Judge Featherstone’s ruling is swiftly overturned. 15.Everybody is reading Joey Potboiler’s new novel, Fighting Vixens of Cell Block D. It must be good. 16.We can never be justified in believing that a miracle has occurred, for proof of a miracle requires very strong evidence. But the only evidence we have is the testimony of witnesses; and their testimony is worthless because they believe in such preposterous things as miracles.

26 26 Jeopardy 17.Almost all members of the U.S. Congress are opposed to term limits. Well, naturally they are opposed! They do not want to be barred from being returned to office as long as they care to run. But since they are the beneficiaries of the status quo, their arguments against term limits can be dismissed as so much self-serving drivel. 18.Professor Stanton M. Buttersworth conducted extensive and long-term studies of the television-watching habits of school children. On the basis of these studies, Professor Buttersworth has concluded that children who watch more than two hours of television a day do not perform as well in school as those who watch less than two hours a day. But Professor Buttersworth must be wrong about that. Television is a source of news, entertainment, and information—and all for an extremely modest cost. Life would be much less interesting without television. 19.Dad, I can’t believe you won’t let me get “I Love Spike” tattooed on my left buttock. After all, I’m sixteen years old, and you told me you and Mom both got your first tattoo when you were sixteen. 20.Many new software programs have bugs in them. Bugs are insects. So, many new software programs have insects in them.

27 27 Jeopardy 21.Ferdie: You shouldn’t step in the bucket when you swing that baseball bat. You lose all your power that way. Casey: What would you know about baseball, squirt? A scrawny geek like you couldn’t hit a baseball if it was sitting on a tee. Why don’t you go play with your pocket calculator or something? 22.Bob: I notice you drink a lot of coffee in Styrofoam cups. Each year Americans throw away 25 billion Styrofoam cups, and they’re not biodegradable. Have you ever considered switching to a reusable coffee mug? Joan: Don’t give me that! If you’re so keen on saving the earth, why don’t you recycle all those aluminum cans you drink from? 23.Teacher: Diana’s mother called the other day and complained about the three hours of homework Diana is required to do each night. Apparently, Diana’s mother believes that schoolchildren should spend all their time talking on the phone, surfing the Net, and hanging out at the mall. Some parents can be so unreasonable. 24.David Trimble has argued that it’s more expensive to live in New York than it is to live in Chicago. But New York is a great place to live. It has great restaurants, museums, and nightspots. I just don’t buy David’s argument at all.

28 Mo: Tiger Woods, the professional golfer, must be an animal hater. Curly: Why do you say that? Mo: He’s shot a lot of birdies in his career, hasn’t he? Curly: Sure. Mo: Well, anyone who would shoot a defenseless little birdie must be an animal hater.

29 29 Answers to Fallacies of Relevance 14. straw man 15. bandwagon argument 16. begging the question 17. attacking the motive 18. red herring 19. look who’s talking; possible weak analogy 20. equivocation 21. personal attack 22. look who’s talking 23. straw man 24. red herring 25. equivocation 1. begging the question 1. begging the question 2. no fallacy 2. no fallacy 3. attacking the motive 3. attacking the motive 4. equivocation 4. equivocation 5. appeal to force 5. appeal to force 6. begging the question 6. begging the question 7. appeal to pity 7. appeal to pity 8. two wrongs make a right 8. two wrongs make a right 9. bandwagon argument 9. bandwagon argument 10. look who’s talking 11. personal attack 12. attacking the motive 13. no fallacy

30 30 More Jeopardy Identify the fallacies of insufficient evidence committed in the following passages. If no fallacy is committed, state “no fallacy.”

31 31 Jeopardy 1.Giving half your money to charity is either morally obligatory or morally prohibited. But giving half your money to charity is not morally prohibited. In fact, it would be highly praiseworthy. Therefore, giving half your money to charity is morally obligatory. 2.IRS agent: Mr. Peckinsniff, there is nothing in these documents that proves that you haven’t been cheating on your taxes. Therefore, I must assume that you have been cheating on your taxes. 3. Kids play too many video games. That’s why there’s so much juvenile crime today. 4.The famous novelist Aldous Huxley, author of Brave New World and other great works of fiction, held that near-sightedness can be corrected by eye exercises. Given the opinion of so eminent a person as Huxley, we may be confident that near-sightedness can indeed be corrected by eye exercises.

32 32 Jeopardy 5. From a student Dear Professor Lott: I can’t believe you took off points from my paper because it contained numerous spelling errors. You sea, I always spell-check whatever I right, so I no my writings contain know spelling errors. 6. Legislators in Texas want to make it a criminal offense for citizens not to use seat belts when they drive. Mark my words: If they get away with this, it won’t be long before they ban beer drinking and cigarette smoking. Then they will restrict our intake of cholesterol, perhaps setting up cholesterol testing sites along major highways. We must not let this infringement of our liberties get started, or there will be no stopping it. 7. No one objects to a lawyer looking up a legal case during a trial. Why, then, shouldn’t students be permitted to look up an answer during an exam? 8.Most Hollywood movie stars believe in reincarnation. I know because I heard it on the Jerry Springer show.

33 33 Jeopardy 9.Herbie: Are you still reading that wacky New Age magazine? Alice: Yes. Herbie: Well, at least you admit it’s wacky. 10.Either you favor unrestricted abortion on demand or you favor a constitutional amendment banning all abortions. I know you don’t favor unrestricted abortion on demand. Therefore, you favor a constitutional amendment banning all abortions. 11.It rains a lot in San Diego during the summer. I know because I spent two weekends in San Diego last summer, and both times it rained like cats and dogs. 12.An extensive, diligent search of the zoo failed to find any trace of the missing gorilla. Therefore, the gorilla probably isn’t in the zoo. It must have escaped.

34 34 Jeopardy 13.Billy, I know you want to go to school today, but you have the flu and you should stay home. If you go to school, you might give the flu to some of your friends and classmates. They, in turn, might give it to their friends and classmates. Eventually, the flu might spread throughout the school. 14. Green tea is leafy, green, aromatic, and tastes great as an iced or hot beverage. Marijuana is also leafy, green, and aromatic. Therefore, marijuana tastes great as an iced or hot beverage too. 15.All workers deserve to be treated with respect and paid a decent wage. That’s why I pay all the employees at my chicken processing plant at least a nickel above the minimum wage and give them a half-day off for Christmas and Easter. 16.Professor Gene Poole, the distinguished microbiologist, has argued that using animals in medical and scientific experiments is morally wrong. Given Professor Poole’s impressive credentials, we should conclude that using animals in medical and scientific experiments is morally wrong.

35 35 Jeopardy 17.Immediately after the governor spoke at the outdoor rally, a bolt of lightning struck City Hall, injuring several people. For the safety of all the residents of this city, it is imperative that the governor not be asked to speak here again. 18.Two years ago I drank a Pond Water Lite beer, and the beer was watery and tasteless. Six months ago I drank a Pond Water Lite beer, and the beer was watery and tasteless. Two weeks ago I drank a Pond Water Lite beer, and the beer was watery and tasteless. I guess all Pond Water Lite beers are watery and tasteless. 19.Tabloid headline: UFOs: Extraterrestrials or Demons? 20. No one has proved that the lost continent of Atlantis doesn’t exist. Therefore, the lost continent of Atlantis probably does exist.

36 36 Jeopardy 21.Your accusation that I am verbose, voluble, long winded, and loquacious is completely unfounded. I’ve never uttered a sentence in my life that contained more than twelve words. 22.Ninety-year-old Bill Tucker has asked that he be released from prison because he is old, infirm, and dying of brain cancer. Unfortunately, Mr. Tucker’s request will have to be denied. If we release Mr. Tucker, we would have to release prisoners that are even less deserving than he is. Eventually, any prisoner with a hangnail or a stubbed toe could successfully petition for early release. 23. Every time I’ve gone to the concession stand for a beer the basketball team has gone on a scoring streak. Hmm, two minutes to go and the team is trailing by six. I guess it’s about time for a beer. 24.On Monday I wore my favorite blue jeans, my homemade skunk-oil hair tonic, and was turned down by Angie for a date. On Tuesday I wore my favorite blue jeans, my homemade skunk-oil hair tonic, and was turned down by Hazel for a date. On Friday I wore my favorite blue jeans, my homemade skunk-oil hair tonic, and was turned down by Iris for a date. I guess if I want a date, I’m going to have to stop wearing my favorite blue jeans.

37 37 Jeopardy 25. My wife is blonde, attractive, and appreciates it when I give her sexy lingerie for Valentine’s Day. My secretary is also blonde and attractive. Therefore, she would appreciate it if I gave her sexy lingerie for Valentine’s Day.

38 38 Answers to Fallacies of Insufficient Evidence 1.false alternatives 2.appeal to ignorance 3.questionable cause 4.inappropriate appeal to authority 5.inconsistency 6.slippery slope 7.weak analogy 8.inappropriate appeal to authority 9.loaded question 10.false alternatives 11.hasty generalization 12.no fallacy 13.no fallacy 14.weak analogy 15.inconsistency 16.inappropriate appeal to authority 17.questionable cause 18.no fallacy 19.no fallacy (no argument is given) 20.appeal to ignorance 21.inconsistency 22.slippery slope 23.questionable cause 24.questionable cause 25.weak analogy

39 39 Problem Identification & Formulation (Back to the Main topic for tonight)

40 40 Problem Identification & Formulation The Nature of Decisions & Problems involves known phases: –Trigger event –Appraisal (Framing) –Exploration –Developing alternative perspectives –Integration

41 41 Problem Identification & Formulation Trigger Points – Positive (Opportunity) – Negative (Problem)

42 42 Problem Identification & Formulation Problem Identification & Formulation Problem Identification – Appraisal: What is the problem Problem vs. opportunity Clearly defined vs. ill defined – Framing the Problem Identify the Problem Define the Objective Define the Goals Define the Criteria Evaluate the Effects of the Problem

43 43 Problem Identification & Formulation Problem Formulation – Forces of Influence Contextual Factors UrgencyImportance Individual vs. Group Personal Attributes Thinking Styles Stakeholders Stakeholders Interest Collective Perception

44 44 Problem Identification & Formulation Problem Formulation – Comparative Methods Tool Examples – Financial Reports – Process Control Charts Technique Examples – Brainstorming – Affinity Diagram – Fishbone Diagram

45 45 Problem Identification & Formulation Problem Statements – Formulate an Effective Problem Statement ClearConciseMeasurableComprehensive

46 46 Next Week… Decision Making – Tools & Techniques Subjectivity vs. Objectivity – Comparative Methods

47 47 Next Week Readings Reading: Interpersonal Skills in Organizations: chapter 19 Reading: Decision Analysis: chapter 2, 6 Reading: Articles for week 3 Review: Venn diagram example Review: Problem Solving Tools and Techniques List

48 48 Next Week Individual Assignment Complete “Thinking Critically” Simulation –link on eResource week 5 material Tools and Techniques Paper: –Prepare a 1,050-1,400-word paper discussing a decision-making tool or technique as described on the course website or another site on the Internet. Make sure your discussion includes a description of the tool or technique as well as an application example from external sources or from your workplace experiences. Explain when one would and when one would not use the tool/technique. Within a Learning Team ensure that two people do not choose the same tool or technique.

49 49 Next Week Team Assignment Part II: Problem Analysis Paper: Prepare a 700-1,050- word paper in which you frame the problem you selected in Learning Team Meeting One. In the paper, include a clear and concise problem statement and address the following: –How did you become aware that there was a problem? –What goals, objectives, and tools/techniques did you use to frame the problem? –What effects does this problem have on the organization? –To what extent can this problem be solved? –What are the causes and forces of influence? –What measurements can be made to determine when the problem is solved? –Define the criteria for measuring a successful outcome. –What alternative solutions can be identified?


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