Final Portfolio

Submit your final portfolio at the English Office (room 305, 10am-12pm)

The portfolio should have the following parts:

1. Title page, including:

Course number

Course name

Final Portfolio

Your name

Date
2. Table of Contents, including

All items from first half of course as well as second half

Page numbers for each item(you can write in the numbers if necessary)
3. All your work, including

Chapter summaries

Chapter maps

Additional topic assignments (ARTS: Awareness, Reasoning, Tactics, System -- three long or six short from either or both of our two texts). Each should be essay type, not short, objective type exercises as found in annotated instructor's editions). Your work must be your own and cannot duplicate the work of other students or other sources.

Logic Glossary

from http://www.philosophy.uncc.edu/mleldrid/logic/start.html

This glossary is excerpted from glossary prepared for my Critical Thinking course, which you may consult for definitions and examples of the informal fallacies and other matters more relevant to that course than to deductive logic. The excerpted material has subsequently been expanded.

Affirming the consequent

Like denying the antecedent, affirming the consequent is a formal fallacy. The fallacy lies solely in the form itself. It has the following pattern: if p then q, q, therefore p. Any argument that fits this pattern is invalid, that is, even if the premises are true, the conclusion that follows from these premises may not be true. Whereas, a valid form guarantees that, if the premises are true, the conclusion will be true. Indeed, if an argument has a valid form and true premises, then it is impossible for the conclusion to be false.

Argument

An argument is a piece of reasoning with one or more premises and a conclusion. Arguments are usually divided into two kinds, deductive and inductive. So defined, an argument is to be distinguished from a disagreement. One may use an argument, in the logician's sense, in order to win an argument, in the everyday sense of a dispute. Clearly the logician's "argument" is not as dramatic as a verbal fight. For an example of an inductive argument see argument from analogy; for an example of a deductive argument see hard determinism.

Argument from analogy

An argument from analogy is an argument that has the form:

All P are like Q
Q has such-and-such characteristic.
Thus P has such-and-such characteristic.

Thus, for example, a few years ago one Republican congressman, who had been a fighter pilot during the Vietnam War, argued in a caucus prior to the election of the Speaker of the House:

Not voting to re-elect Newt Gingrich would be like abandoning your wingman.
Abandoning your wingman is wrong.
So not voting to re-elect Newt would be wrong.

One evaluates such an argument by examining the analogy. It is a weak analogy, and thus fallacious, if there are not many similarities. For instance, in this example there is some similarity between the two situations. The Congressman no doubt felt that with Speaker Gingrich having been charged with ethics violations that he was under attack as a fighter pilot's wingman could be. But there are also dissimilarities. Voting for Speaker of the House is not a life-or-death situation. Moreover, n combat, one neither gets to choose one's wingman nor one's mission. Yet it is the obligation of a congressman to vote for the officers of the House of Representatives as s/he sees fit.

Here's a stronger analogy:

Premise: Learning logic is like learning a foreign language.
Premise: You can't learn a language by cramming; you have to study it regularly.
Conclusion: You can't learn logic by cramming; you have to study it regularly.

Notice the form is the same for a weak or a strong analogy. What makes a weak analogy fallacious is not the pattern of reasoning but a lack of compelling similarities to warrant the alleged one.

Conclusion

A conclusion is the supported claim that is being made. In an argument one expects that a claim will be supported with reasons or premises. Moreover, these premises will be true and will, in fact, lead to the conclusion. Hence arguments can be evaluated as to how well they do this: Are the premises true? Is the reasoning good?

Conditional

A conditional statement is an if-then statement and consists of two parts, an antecedent and a consequent. The antecedent, or that which goes before, is preceded by the "if"; the consequent, or that which comes after, may be preceded by a "then". English sentences sometimes reverse the order: John studies hard if he thinks that he will do well in a class. But the logic of this sentence is: If John thinks that he will do well in a class, then he studies hard. Here the antecedent is "John thinks that he will do well in a class" and the consequent is "he studies hard".

Consistency

Consistency is much prized in reasoning. Ideally, one would like for one's beliefs to fit together without any contradictions. Consistency is the intuitive notion that is the basis for the understanding of validity: we expect true premises to lead to a true conclusion. When we find that we have true premises and a false conclusion we lack consistency between premises and conclusion and know that the argument form is invalid.

Contradiction

A contradiction occurs when one asserts two mutually exclusive propositions, such as, "Abortion is wrong and abortion is not wrong." Since a claim and its contradictory cannot both be true, one of them must be false. Few people will assert an outright contradiction, but one may fall into an inconsistency.

Counterexample

A counterexample is an example that runs counter to (opposes) a generalization, thus falsifying it. A TV newscast that limited its coverage of "mayhem and misery" (in Bob Inman's phrase) would falsify a claim that all local TV newscasts focused on crime and disasters. Consequently, careful thinkers avoid rash generalizations (see hasty generalization) by qualifying their generalizations. If there are local TV newscasts that do not focus on "mayhem and misery," one could say, "Most local TV newscasts focus on "mayhem and misery."

Deductive

A deductive argument is one that derives the truth of the conclusion from the truth of the premises. If the argument form, or structure of the argument, is valid, then the conclusion will always follow from the premises. The hard determinism argument below is an example of a deductive argument that makes use of two modus ponens arguments in which the conclusion of the first serves as the premise of the second, or so it appears.

Denying the antecedent

Denying the antecedent, like affirming the consequent, is a formal fallacy. Denying the antecedent has the following form, or pattern: if p then q, not-p, therefore not-q, or

if p then q
not-p
------------
not-q

Both formal fallacies are easily confused with two valid argument forms: modus ponens and modus tollens. Here is an analysis of the four forms according to affirmation-denial and antecedent-consequent:

	antecedent	consequent
affirm	(1)modus ponens	(2)affirm the consequent
deny	(3)deny the antecedent	(4)modus tollens

(1) and (4) are valid argument forms; (2) and (3) are invalid.

Dilemma

In popular use a dilemma can be almost any sort of difficult choice, but in logic a dilemma is a choice in which there are only two options, attractive or not. One can refute a dilemma, that is, show that is not a real dilemma, by finding a third possibility.

Disjunctive Syllogism

If there are only two possibilities, one of which is true, and then, if one is eliminated, the remaining one is true. Hence the following argument form:

Either X or Y
Not X
Therefore Y

This form of argument is a disjunctive syllogism. It is a syllogism, that is, an argument with two premises, and one of the premises is a disjunction. Here is an ordinary language example:

Either you pass logic or you do not graduate.
You will not pass logic.
Therefore you will not graduate.

Fortunately, the first premise is not true. Hence the argument, while valid is not sound.

Empirical

From a Greek word meaning "to experiment," it is used by philosophers to mean that which has to do with sense experience.

Empirical generalization

Empirical (or inductive) generalizations are general statements based upon experience.

Most student desks in older classroom buildings at UNC Charlotte have gum stuck underneath the desk tops.

A good generalization will be developed from a large number of varied experiences. For instance, one could offer as a justification for the previous generalization:

I've looked underneath several desks in several classrooms.

Generalizations drawn from a small number of instances or from anecdotal evidence are said to be hasty generalizations.

Explanation

An explanation identifies the cause of an event, thus answering the question why something is what it is or why it occurs. Historical explanations show how something came to be what it is. For instance, Old Shell Road in Mobile got its name because at one time the street was paved with shells dredged from Mobile Bay. A scientific explanation identifies the conditions that must be present for something to occur. For instance, an explanation of why matches light would identify, among other things, the presence of oxygen, a phospherous tip, a wooden stick and friction.

The following example, contributed by Lee-Marie Davis, a student in one of my critical thinking classes, explains why a particular explanation is an explanation:

Explanations identify causal relationships. They tell why or how something happens. The following is an example of an explanation:

My father was diagnosed with lung cancer two years ago. Of course, one of the very first questions out of his mouth was, "Why did this happen?" The doctor explained to my dad that he fit into three categories of risk factors that contribute to the onset of cancer in some patients. The first category that the doctor said my did fit into was that he had a history of cancer in his family. The second category was that my dad had smoked for almost 30 years, and the third category was that my dad had gone through a period of high stress.

This is an explanation because the doctor tells my dad why he had cancer. The doctor gives him three reasons that had put my dad at risk for lung cancer. He told him that he fit into the risk categories of family history, high stress and was a smoker. The explanation of the doctor helped my dad better understand why he had the cancer by telling him the cause of the cancer.

Fallacy

A fallacy is an attractive but unreliable piece of reasoning, or affirming the consequent and denying the antecedent. Informal fallacies include begging the question, composition, division, equivocation, false cause, false dichtomy, hasty generalization, personal attack, red herring, slippery slope, straw man, weak analogy. There are many other examples of bad reasoning that have been identified by logicians, but these are enough to illustrate the idea of a fallacy.

Form

Arguments often exhibit one or more reasoning patterns. These patterns, such as modus ponens or an argument from analogy, are called forms and are to be distinguished from the content of the actual argument. Just as a coffee cup or mug has a distinctive shape and is distinguishable from what you put it (the coffee or content), so argument forms are identifiable and not to be confused with the actual premises and conclusions used.

Hard determinism

Determinism is the view that all events are caused. One form of determinism, one that pushes the notion of universal causation to unacceptable consequences, is hard determinism. Here, in summary form, is an argument for this extreme view. I offer it as an example of a flawed deductive argument:

1. All events are caused.

2. If all events are caused, then there are no free actions.

3. There are no free actions (from 2 and 1 by modus ponens).

4. If there are no free actions, then there is no personal responsibility.

5. There is no personal responsibility (from 4 and 3, once again, by modus ponens).

There is nothing apparently wrong with the form of this argument, for modus ponens is a valid argument form. Unless one is prepared to accept the consequences that we lack both freedom and responsibility, then one must find some other error.

Hasty Generalization

A generalization based on too little or unrepresentative data. The relevant rule that it violates is: Generalizations should be based on a large number of various representative examples. Here is a note I once received from a student (the names have been changed):

Mr. Eldridge, As you notice, I was not in class Thursday, due to the flu. I gave my paper to Justin because he was going to class. On Sunday, I found out he did not attend class. Here is my revised paper. Let's hope this will work! Now, I've learned not to trust other people. Laura Walker

Hasty generalizations should not be confused with the fallacy of composition. In a hasty generalization one infers a general statement on the basis of an atypical instance; whereas in the fallacy of composition you take something that is true of each of the parts and attribute to the whole. Composition, like division, confuses distribution and collectivity (whether something is considered individually or as a whole); hasty generalizations infer something to be true generally on the basis of a limited number of unrepresentative instances.

Inconsistency

Inconsistency is to be avoided, for it indicates error. It is an implicit contradiction. An inconsistent set of statements will not be an outright contradiction but will lead to one. For example, if one declares:

All UNC Charlotte students are hardworking.
Jim Schwartz is a UNC Charlotte student, and
Jim Schwartz is lazy,

then s/he is being inconsistent. There is no contradiction here, such as,

Jim Schwartz is hardworking and Jim Schwartz is lazy,

but, clearly, there is an inconsistency. For if all UNC Charlotte students are hardworking, then it is impossible for Schwartz to be a UNC Charlotte student and not be hard-working. It is implicitly contradictory to say that Schwartz is UNC Charlotte student (and thus hard-working) and to claim that he is lazy, that is, not hard-working. See consistency.

Inductive

Unlike deductive arguments, inductive ones promise only probability, not certainty. Thus, if one argues that having watched several different newscasts in several different cities on many different nights one may infer that newscasts emphasize, in Bob Inman's phrase, "mayhem and misery", then one is making an inductive argument. (In this case, an inductive (or empirical) generalization. Another kind of inductive argument is an argument from analogy. Inductive arguments are judged by their reliability, where one expects only a high degree of probability, not one hundred percent reliability as with deduction.

Logic

Logic is the study of correct reasoning. It both describes and evaluates the way in which we draw inferences. Inferences are formulated as arguments and then evaluated as to their validity and soundness. The aim is to find generally reliable (see inductive) or always reliable (see deductive) arguments. Although logicians describe our reasoning patterns, this task is more properly the work of psychologists. The logician's primary concern is normative--how we should reason. The value of this ancient enterprise, which can be traced back to Aristotle and his predecessors, notably Zeno of Elea, is well expressed by the British philosopher, Patrick Shaw, in the preface to Logic and Its Limits (Oxford University Press, 1997):

Most of the time, the ordinary person does think straight. In countless ways social life depends on doing so. Balancing the housekeeping money, locating a fault in a wiring system, planning a day out--all involve, tacitly or otherwise, working out what is compatible with what. I cannot spend this pound and save it; if the bulb works in another socket then the fault does not lie in the bulb; either we catch the five o'clock train or we will not be able to get to the concert. These are the kind of commonplaces that underpin any sort of planned, purposive behaviour. They are largely taken for granted, and any mistakes in reasoning quickly run up against the harsh corrective of experience.

Problems arise when the test of experience is neither so immediate nor overwhelming. People speculate on what the facts might be when the facts are not obvious; and they disagree in their speculations. Also people pronounce upon, and disagree about, what ought to be the case, or whether one thing is better than another. They are not disagreeing about what is the case, so they cannot appeal straightforwardly to experience.

When these kinds of disagreement occur, when the competing claims cannot be easily and obviously tested, attention is bound to turn to the route by which a cotnroversial conclusion was reached. We are forced to become self-conscious about the reasoning process. How far reasoning will take us remains to be seen, but so far as it leads we must be sure that it is sound.

Modus ponens

A valid argument form, not to be confused with affirming the consequent, modus ponens consists of a conditional statement and one other premise. The second premise affirms the antecedent of the conditional, yielding the consequent as the conclusion:

if p then q
p
-----------
q

Modus Tollens

A valid argument form, modus tollens is not to be confused with denying the antecedent. Modus tollens consists of a conditional statement and one other premise. The second premise denies the consequent of the conditional, yielding the denied antecedent as the conclusion:

If p then q
not-q
-----------
not-p

Necessary and sufficient conditions

If event A must occur for event B to occur, then we say that A is necessary for B. If event A may cause B but there could be some other cause as well, then we say that A is sufficient to cause B.

Premises

Statements offered as reasons to support a conclusion are premises. Logicians generally pay more attention to the reasoning, that is, the relationship between premises and conclusion. They rely on scientists to determine the accuracy of the premises.

Salva Veritate

A Latin phrase which literally mean "saving truth"; salva veritate is used by logicians to express the concept of truth preservation, which is the test of a valid deductive argument. If a deductive argument does not preserve the truth of the premises (assuming they are in fact true), then it has an invalid argument form. Salva veritate is the necessary and sufficient condition for a valid argument form.

Soundness

A deductive argument is said to be sound if it meets two conditions: valid argument form and true premises. (Notice that validity and true premises constitute necessary and sufficient conditions for soundness.)

Truth-value

Every proposition is either true or false. This status is called "truth-value".

Unstated premises

Not every argument is fully expressed. Sometimes premises or even conclusions are left unexpressed. If one argues that Rover is smart because all dogs are smart, he is leaving unstated that Rover is a dog. Here the unstated premise is no problem; indeed it would probably be obvious in context. But sometimes unstated premises are problematic, particularly if two parties in a discussion are making differing assumptions. If one person thinks violence depicted in the media encourages violent behavior and another does not, then an argument that proceeds as follows will be evaluated differently by the two parties:

There's too much violence on TV.
No wonder we have so much violence among kids these days.

What will appear obvious to the person making these statements will not be so clear to the person who may be wondering what is the connection between the premise--there's too much violence on TV--and the conclusion--no wonder we have so much violence among kids these days. Hence the need for critical awareness. One function of critical thinking is to make the reasoning under discussion explicit.

Valid

Validity is a characteristic of good deductive argument forms, those patterns which are one hundred percent reliable. It is impossible for a valid deductive argument with true premises to have a false conclusion. See soundness.

Venn diagrams

Diagrams developed by John Venn, an English logician, in 1881 to represent categorical propositions and categorical syllogisms. They consist of two (for propositions) or three (for syllogisms) overlapping circles and are commonly used in introductory logic courses to represent and test the validity of categorical syllogisms.

Weak Analogy

An argument that infers that because two objects or situations are alike, then what is true of the one is true of the other, yet fails to notice a telling difference between the two objects or situations.

No one objects to a physician looking up a difficult case in medical books. So no one should object to nursing students, when taking a logic exam, being permitted to use their reference materials.

A weak analogy is an argument from analogy; it is just not a very good one.

Back to Logic home page

Copyright © 1999, 2000 Michael Eldridge

Midterm Portfolio

Use the computer lab to ready your portfolio for submission at the English Office (room 305).

The portfolio should have the following parts:
1. Title page, including course name, "Midterm Portfolio," your name, date
2. Table of Contents, including all items, page numbers (yhou can write in the numbers)
3. All your work, including chapter summaries, chapter maps, assignments (each should be essay type, not short, objective type exercises as found in annotated instructor's editions). Your work must be your own and cannot duplicate the work of other students or other sources(each student's work will be unacceptable if duplicated or plagiarized).

NEW WORDS FOR THE NEW MILLENIUM

BLAMESTORMING: Sitting around in a group, discussing why a
deadline was missed or a project failed, and who was
responsible.

CHAINSAW CONSULTANT: An outside expert brought in to reduce
the employee headcount, leaving the top brass with clean
hands.

CUBE FARM: An office filled with cubicles.

IDEA HAMSTERS: People who always seem to have their idea
generator running.

MOUSE POTATO: The on-line, wired generation's answer to the
couch potato.

PRAIRIE DOGGING: When someone yells or drops something loudly
in a cube farm, and people's heads pop up over the walls to
see what's going on.

SITCOMs: (Single Income, Two Children, Oppressive Mortgage)
What yuppies turn into when they have children and one of them
stops working to stay home with the kids.

STARTER MARRIAGE: A short-lived first marriage that ends in
divorce with no kids, no property and no regrets.

STRESS PUPPY: A person who seems to thrive on being stressed
out and whiny.

SWIPED OUT: An ATM or credit card that has been rendered
useless because the magnetic strip is worn away from extensive
use.

TOURISTS: People who take training classes just to get a
vacation from their jobs. "We had three serious students in
the class; the rest were just tourists."

TREEWARE: Hacker slang for documentation or other printed
material.

XEROX SUBSIDY: Euphemism for swiping free photocopies from
one's workplace.

ALPHA GEEK: The most knowledgeable, technically proficient
person in an office or work group.

CHIPS & SALSA: Chips = hardware, Salsa = software. "Well,
first we gotta figure out if the problem's in your chips or
your salsa.

Syllabus -- Critical Thinking

ENGLISH 75 Syllabus Lincoln University

CRITICAL THINKING

Dr. Sylvia Y. R. Schoemaker profsylvia@gmail.com

Semester: Spring 2006

Contact hours: 48

Units: 3

Days: T-Th; Time: 9:30 -10:45; Location: Room 303

Office hours: T-Th, 9-9:30, 12:15-1, by arrangement

Phone: 510.628.8036

Course Blog: criticalthinkingmatters.blogspot.com

Objectives:

Students will develop their cognitive skills and enhance their communicative strategies for defining, applying, analyzing, synthesizing and evaluating information. The course will incorporate the following University learner and institutional goals:

University learner goals 1 -6, and specifically (3.2) To examine objectively various sides of issues; (3.3) To utilize the procedures involved in systematic problem solving; and in English:: To develop basic academic and professional skills(1); To develop the ability to communicate effective in English, oral and in writing, and to read with understanding (1.1) and institutional goals , especially 1,(1.1-1.4), 2.4

Catalog Course Description

ENG 75- CRITICAL THINKING (UNIVERSITY COURSE LISTING) Consideration of cognitive skills and communicative strategies for defining, applying, analyzing, synthesizing and evaluating information. Course includes structural and operational approaches to task/mission analysis, decision-making, change forecasting, adaptation, and evaluation. Systems approach to analysis and solution of complex problems. Conceptual issues in problem definition, goal determination and measurement of effectiveness. (3 units)

Methods and Materials

A cooperative learning model will be employed. Small group and individual discovery exercises and presentations will augment lectures, class discussions and applications.

Emphasis will be on a systems approach to analysis and solution of complex problems, a conceptual approach to issues in problem definition, goal determination and measurement of effectiveness.

Required Texts:

(TFY) Mayfield, Marlys. Thinking for Yourself. 6^th Edition. Boston: Heinle, 2004. (ISBN: 0-8384-0735-8)

(CRCB) Daiek,Deborah and Macomb, Nancy. Critical Reading for College and Beyond. McGraw-Hill, 2004. (ISBN: 0072473762)

Recommended Text:

(CPS) Harris, Robert. A. Creative Problem Solving. Los Angeles: Pyrczak Publishing, 2002. ISBN: 1-884585-43-4

Student Responsibilities:

Students are expected to attend class, be punctual, follow classroom decorum, complete assignments, participate in the course in a productive manner, and to take personal responsibility for meeting the objectives of the course.

Evaluation

Students will be evaluated on the basis of all assignments, exercises, class participation, portfolios, midterm and final presentations; extra credit work/journals. Student course productivity will be averaged in appropriate proportions in determining the final grade along the following guidelines:

Classroom work:

Attendance, punctuality, decorum 10%

Productive classroom participation 10%

Class quizzes, exercises 15%

Individual/ group presentations 10%

Term Assignments:

Midterm portfolio 20%

Final portfolio 25%

Extra credit work/journals 10%

					TFY			CRCB
#	Tuesday	Thursday
1	1/17/2006	1/19/2006		Observation	1		Reading	1
2	1/24/2006	1/26/2006		Word Precision	2		Vocabulary	2
3	1/31/2006	2/2/2006		Facts	3		Memory	3
4	2/7/2006	2/9/2006		Inferences	4		Time	4
5	2/14/2006	2/16/2006		Assumptions	5		Main Ideas	5
6	2/21/2006	2/23/2006		Opinions	6		Details	6
7	2/28/2006	3/2/2006		Evaluations	7		Inference	7
8	3/7/2006	3/9/2006		MT Portfolio	Review		Texts	8
	3/14/2006	3/16/2006	Spring recess 13-17
9	3/21/2006	3/23/2006		Review	Review		PSR Strategies	9
10	3/28/2006	3/30/2006		Viewpoints	8		Marking	10
11	4/4/2006	4/6/2006		Argument	9		Advanced Strategies	11
12	4/11/2006	4/13/2006		Fallacies	10		Arguments	12
13	4/18/2006	4/20/2006		Inductive Reasoning	11		Cognitive Domain	13
14	4/25/2006	4/27/2006		Deductive Reasoning	12		Evaluation	14
15	5/2/2006	5/4/2006		Research Paper	Appendix		Applications
16	5/9/2006	5/11/2006		Prepare Portfolios			Prepare Portfolios
17	5/16/2006	5/18/2006	Finals Week	Final Portfolios			Final Portfolio

Assignment Schedule

TFY: Thinking for Yourself -- CRCB: Critical Reading for College and Beyond

Assignments -- Spring 2006

Week #	Tuesday	Thursday
1	1/17/2006	1/19/2006		Observation	1		Reading	1
2	1/24/2006	1/26/2006		Word Precision	2		Vocabulary	2
3	1/31/2006	2/2/2006		Facts	3		Memory	3
4	2/7/2006	2/9/2006		Inferences	4		Time	4
5	2/14/2006	2/16/2006		Assumptions	5		Main Ideas	5
6	2/21/2006	2/23/2006		Opinions	6		Details	6
7	2/28/2006	3/2/2006		Evaluations	7		Inference	7
8	3/7/2006	3/9/2006		MT Portfolio	Review		Texts	8
	3/14/2006	3/16/2006	Spring recess 13-17
9	3/21/2006	3/23/2006		Review	Review		PSR Strategies	9
10	3/28/2006	3/30/2006		Viewpoints	8		Marking	10
11	4/4/2006	4/6/2006		Argument	9		Adv. Strategies	11
12	4/11/2006	4/13/2006		Fallacies	10		Arguments	12
13	4/18/2006	4/20/2006		Inductive Reasoning	11		Cognitive Domain	46
14	4/25/2006	4/27/2006		Deductive Reasoning	12		Evaluation	14
15	5/2/2006	5/4/2006		Research Paper	Appendix		Applications	Application 1 or 2
16	5/9/2006	5/11/2006		Prepare Portfolios			Prepare Portfolios
17	5/16/2006	5/18/2006	Finals Week	Final Portfolios			Final Portfolio