DOCUMENT RESUME ED 361 708 CS 214 002 AUTHOR Hatcher, Donald L.; And Others TITLE Reasoning and Writing: An Introduction to Critical Thinking. SPONS AGENCY Fund for the Improvement of Postsecondary Education (EE), Washington, DC. PUB DATE 90 CONTRACT P-116B-80985-88; P-116B-91238 NOTE 376p. PUB TYPE Guides - Classroom Use Teaching Guides (For Teacher) (052) Reports - Descriptive (141) EDRS PRICE MF01/PC16 Plus Postage. DESCRIPTORS Class Activities; *Critical Thinking; Higher Education; *Logical Thinking; Program Descriptions; Textbook Preparation; *Thinking Skills; Writing (Composition); Writing Assignments; Writir.g Instruction IDENTIFIERS Baker University KS ABSTRACT Combining instruction in critical thinking and expository writing with the study of classic texts, this textbook was developed at Baker University (Kansas) and is designed for use in a two-semester college course that fosters careful thinking and good reasoning in students. The textbook emphasizes the pedagogical principle that critical thinking and writing can best be understood, at least for beginners, as formal processes with clear strategies for success, and that some knowledge of formal logic is required to understand better the patterns of good reasoning. Chapters in the book are: (1) Introduction: Why Critical Thinking?; (2) What Is Critical Thinking?; (3) Understanding What You Read; (4) Evaluating Arguments: Deductive Reasoning and Logical Form; (5) Inductive Logic; (6) Informal Fallacies; and (7) Reasoning and Writing. Appendixes presents a glossary of grammar terms and a sample paper: additional appendixes discuss standards for written prose; correcting faulty grammar; documentation techniques; critical thinking and literary criticism; critical thinking and values; and predicate logic. An attachment describes the initial project from which the textbook was developed and presents a course description and list of readings. (RS) *********************************************************************** Reproductions supplied by EDRS are the best that can be made from the original document. *********************************************************************** REASONING AND WRITING: AN INTRODUCTION TO CRITICAL THINKING BAKER U.S. DEPARTMENT Of EDUCATION Office of Educational Resesich and Improvement EDUCATIONAL RESOURCES INFORMATION CENTER (ERIC) AZdocument has been reproduced an UNIVERSITY eived from the person or organdahon ornating 0 Minor changes have been made to improve reproduchon Quality Pnts of view or opinions stated in this dcc., . ment do not necessarily represent official OERI position or policy BEST COPY AVAILABLE Developed Collaboratively by Donald L. Hatcher, Project Director E Dean Bevan J. Preston Farnbrough Karen Horvath Virginia L Jones Robert C. Kahle Earl D. Kirk Lucy J. Price L Anne Spencer George B. Wiley Jane Woodruff Funds necessary to research and write this text were provided by two grants from the U.S. Department of Education's Fund for the Improvement of Post-Secondary Education. We are especially indebted to David Arnold, our FIPSE Program Officer, for his support and encouragement. We are also grateful for the helpful comments of Ed Damer, Ralph Johnson, Connie Missimer, Steve Norris, Jerry Nosich, and Harvey Siegel. Each acted as a consultant for the project and made invaluable suggestions for organizing the text. Much instructive criticism was also provided by Baker faculty, representing a variety of disciplines, who volunteered to work through the text. These faculty members include Mike Barbush, Rick Botkin, Steve Brooks, Lowell Gish, Jean Johnson, Roger Kugler, Bob Miller, Merrie Skaggs, Mike Valk, and Thom Ward. Special thanks must be given to Georgeann Haynes, Libby Snider, and Teri Wollin without whom the many drafts of this text would never have been completed. We especially appreciate the support of the Baker University Administration throughout the pilot stage of this project. Baker University Center for Critical Thinking Baldwin City, Kansas 66006 Copyright 1990 Final Taw Preparasion: Donald L Mather, Virginia Jona, and Ead Kit* Dominate Layout Daionsid by L Anew Spence 3 lairrTABLE OF CONTENTS Chapter One Introduction: Why Critical Thinking? 1 Introduction 1.1 1 1.2 Critical Thinking and the Western Tradition 1.3 The Value of Critical Thinking 5 1.4 Critical Thinking and Logic 12 1.5 Critical Thinking Ind Writing 14 1.6 Conclusion 17 Exercise 1.6 19 Endnotes for Chapter One 20 Reading: Plato, "Allegory of the Cave" 23 Chapter Two What Is Critical Thinking9 33 2.1 The Nature of Critical Thinking 33 2.2 Some General Principles for Critical Discussion 36 Exercise 2.2 40 2.3 What Critical Thinking Is Not 41 Exercise 2.3 45 2.4 A Profile of a Critical Thinker 46 Exercise 2.4 53 2.5 Hindrances to Critical Thinking 54 Exercise 2.5 60 2.6 Summary and Conclusion 61 Exercise 2.6 62 Endnotes for Chapter Two 65 Chapter Three Understanding What You Read 67 3.1 The Uses of Language 67 Exercise 3.1 71 3.2 Summarizing 72 Exercise 3.2 76 33 Opinions and Arguments 88 Exercise 3.3 93 3.4 Enthymemes 95 Exercise 3.4 97 Glossary for Chapter Three 98 Endnotes for Chapter Three 99 Chapter Four Evaluating Arguments: Deductive Reasoning and Logical Form 101 4.1 Introduction 101 4.2 Identifying Logical Form 104 Exercise 4.2 109 4.3 Logical Connectives and Truth-functional Connectives 110 Exercise 4.3 119 4.4 How to Determine Validity 121 Exercise 4.4 125 4.5 More on Symbolizing Arguments 127 Exercise 4.5 130 4.6 Implications for Critical Thinkers 131 Glossary for Chapter Four 133 Reading: James Madison, "Federalist Paper #10" 135 Chapter Five //Inductive Logic 143 5.1 Introduction and Review 143 5.2 On Methods of Induction 146 53 The Logic of Necessary and Sufficient Conditions 155 5.4 The Logic of Correlations 157 5.5 Analogical Arguments 157 5.6 Conclusion 159 Exercise 5.6 161 Endnotes for Chapter Five 163 Reading: Francis Bacon, "The Four Idols" 165 Chapter Six Informal Fallacies 177 Exercise 6.1 186 Exercise 6.2 188 Chapter Seven Reasoning and Writing 189 7.1 Expository Writing 189 7.2 What is a Thesis? 189 Exercise 7.2 193 7.3 Using Reasoning Strategies to Construct a Thesis 194 Exercise 73 199 7.4 Using Reasoning Strategies to Critique a Position 200 7.5 Hints on How to Write a Critical Paper 203 Conclusion 205 Readings: Thomas Aquinas, "Five Proofs for the Existence of God" 211 Bertrand Russell, "Why I am not a Christian" 219 Plato, "Apology" 237 Plato, "Crito" 261 Page ii 5 Appendix A Standards for Written Prose 777 Appendix B Correcting Faulty Grammar Appendix C Glossary of Grammar Terms 797 Appendix D Documentation Techniques 309 Appendix E Critical Thinking and Literary Criticism 313 Appendix F Critical Thinking and Values 315 A.1 Importance of Values 315 A.2 Values in General 316 A3 What is Human Happiness9 318 A.4 Evaluating Things and Institutions 320 A.5 Ethical Values 322 A.6 Intellectual Obligations 329 A.7 Conclusion 330 Exercise 331 Endnotes for Appendix E 332 Appendix G Predicate Logic 333 A.1 Symbolizing Sentences 333 Exercise Al 335 A2 The Universal Quantifier 336 Exercise A.2 338 A.3 The Existential Quantifier 339 Exercise A.3 340 A.4 Proving Validity with Quantifiers 341 Exercise A.4 344 Appendix H Sample Paper 345 11111111111111P 0 Page iii Chapter One Introduction Why Critical Thinking? No one can be a great thinker who does not recognize that as a great thinker it is his first duty to follow his intellect to whatever conclusions it may lead. Truth gains more even by the error of one who, with due study and preparation, thinks for himself than by the opinions of those who only hold them because they do not suffer themselves to think. J. S. Mill, On Liberty Introduction 1.1 This is a book about reasoning and writing. It is based on the assumption that through the course of our college education we should come to understand and appreciate the nature of clear thinking and reasoned argument. Without such an understanding, it is impossible to evaluate honestly the worth of the alternative claims. human values, and ways of life that are often presented in various courses and texts. Evaluating alternative positions means understanding the claims and weighing the strength of the reasons given in their support. The ability to conduct such an evaluation is part of what it means to be a critical thinker. To this end, we need to understand the nature of careful thinking and good reasoning. Just as importantly, however, we must also develop a habit of mind that inclines us to be critical in any area of life where deliberation, choice, and action are appropriate. As critical persons, we should be inclined to discriminate between bcliefs and values for which there are good reasons and those for which the reasons are not so strong. We should accept the former while remaining skeptical of the latter. In Page 1 Reasoning and Writing other words, to use a metaphor common-in education, students who are critical thinkers become "filters" who selectively allow only the more carefully considered beliefs and values to guide their lives. Critical thinkers refuse to be "sponges" who indiscriminately soak up whatever belief, value, or bit of information comes their way. Given such educational goals, certain important questions arise: What skills, dispositions, and knowledge do critical thinkers need? What forces prevent humans from developing their critical faculties? How are critical thinking and the reading of primary texts related? What is the relationship between learning to think critically and becoming a good writer? These questions and others will be explored in the following chapters. imum.1.2 Critical Thinldng and the Western Tradition Our approach combines instruction in critical thinking and expository writing with the study of classic texts. How do these three areas of study fit together? In 1983, after the College Board had conducted an extensive study of the skills college-bound of freshmen needed, board president George Hanford suggested that, beyond the skills reading, writing, and arithmetic, it was imperative to teach *the Fourth R" (reasoning) throughout high school. Hanford stated that reading and writing were of little use if one could not evaluate critically what one read or wrote. He claimed that, for the sake of developing students' rational and critical abilities, teachers should be willing to sacrifice some course content and devote time to teaching the strategies for critical evaluation. He urged teachers to design assignments so that students were asked to use these skills.' A few years after Hanford made this plea for teaching "the Fourth R," other critics of education began to lament the fact that American education was ignoring the intellectual foundations necessary for our students to understand our culture, its values, and its problems. In 1987 Allan Bloom, in his book The Closing of the American Mind, presented a bleak view of contemporary university education. In his Page 2 Chapter One: Why Critical Thinking? view, the foundations of our culture had been destroyed through neglect. and what was called education had become a hodgepodge of requirements from disparate disciplines with no unified vision or theme. He was concerned because modern students were not required to read any of the classic texts of the Western tradition. works which contained a wealth of competing positions and arguments. Bloom maintained that if students had no knowledge of the arguments for alternative points of view, they were no longer in a position to pass enlightened judgment on the wide variety of competing positions, values, and institutions presented in our contemporary. pluralistic society. Bloom's book became a surprise best-seller. However, much of the university community was predictably not very enthusiastic. It was..after all, the members of that community who were being criticized for watering down education and for not developing students' critical abilities, i.e., for "closing the American mind." When Bloom claimed that students should study specific primary texts, most reviewers seemed to think that he was proposing an elitist education.2 These critics assumed that many of today's college students were incapable of understanding the works studied by our nation's founding fathers, who used them as guides to their own thinking when they framed the U.S. Constitution. These critics held that to require all students to study these works would be "elitist education." Such criticism seems unduly negative. It implies an irreversible degradation of student abilities. It implies that anything that is required in a college education should be something that evety student can easily mastei. Such a position is egalitarianism at its worst: the best-prepared students remain unchallenged while the worst-prepared develop a false sense of superiority. The texts for this course sequence are not unchallenging. They are chosen with the assumption that all students can learn to read, understand, and evaluate texts that have been and continue to be important in our culture's continuing development. These texts include writings by Plato, Aquinas, Bacon. and Madison. to name only a few. Page 3 Reasoning and Writing Another criticism of Bloom's book was that his prescribed readings from the Western tradition tended to be reductionist and ethnocentric. Many of the works were written by white males of the Western culture and hence tend to reflect the values of that culture. Nonetheless. Bloom may have missed a golden opportunity to explain why the ideas expressed in these favored works were important not only for our culture's traditions but also for the development of any educated mind. The sex and race of an author may affect the author's ideas, but whether the ideas are worthy of study has nothing to do with their source. To reject an idea because of its source is to commit a logical fallacy. What one finds in the works of thinkers like Homer, Sophocles, Plato, and Shakespeare are important and thought-provoking ideas. One also finds arguments that support the ideas and critique alternatives. Both the ideas and the arguments call for an evaluation by the reader. The critical reader soon imds that the truth of claims about important ideas is not self-evident, but is always controversial The works invite us to analyze and evaluate claims rather than to accept them without thought. The value of studying many of the "great works" of the Western culture is that one soon finds that any idea, value, institution, scientific theory, or educational practice that is proposed as a candidate for "the truth" at the same time asks for critical scrutiny. Most of the great works of the Western tradition are unified in their rejection of dogmatism and uncritical acceptance of authoritarian ideas. The Western tradition is one that endorses the value of critical thought and those other values nezessary to engage in open diswssion and honest criticism. To make a claim is at the same time to invite criticism. If indeed this is what studying some of the important works of Western culture involves, then the study of such texts and the study of the methods of critical thinking form a marriage of naturally complementary subject matter. Critical thinking and primary texts belong together. Primary texts, as do many great works of art, both convey important ideas and invite the reader to think critically about those ideas. Often the texts are themselves examples of the process of critical thought, e.g., Plato's dialogues, scenes from great plays or novels, or philosophical essays. However, if one studies only the texts without instruction in how to evaluate critically the variety of competing claims presented in the texts, one may have the feeling of encountering a Page 4 1 0
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