PHI 2100: Formal Logic I

Fall 2002

CL1-219,Tues/Thurs 2:30-3:45

 

---

 

Instructor and Contact Information:

Dr. Nancy Stanlick

CNH 411-I/407-823-2273 or 407-823-5459

e-mail: stanlick@pegasus.cc.ucf.edu

Office Hours:  Tues, Thurs 1:15-2:15; Wednesday 10:30-12:00, & by appointment

 

---

Text:

S. Layman, The Power of Logic, 2nd edition (Primis Custom Publishing, McGraw-Hill)

The text for this course is a custom publication from Primis, a division of McGraw-Hill publishing company.  Note that chapters in the text are 1, 5, 6, 7, 8, and 9.  Chapters not used have been omitted.  This accounts for the deletion of chapters 2-4 and others in the larger (and more expensive) full text.  Some chapters from another text, Logic and Language © 1988-2002, will be used from time to time in this course and relevant pages, chapters, or problems will appear in class or on the website for this course.  You need not buy anything to use selections from that text.  All elements of Logic and Language are used by permission and full permission is granted to students in this course to copy pages (for personal use only) from Logic and Language that appear on this website.

 

---

Course Requirements/Course Description and Objective:

 

3 Examinations = 69% (23% each)

Attendance, Quizzes, Assignments (31%)

 

Formal Logic I is a course in introductory formal logic beginning with basic concepts of traditional (Aristotelian) logic (TL), moving then through formal proofs and elements of prepositional/statement (sentence) logic (SL), and ending with aspects of the theory of quantification (predicate logic) (PL). You should become proficient in the use of symbol systems, ordinary language and symbolic translations, and methods of proof.  Topics include forms of immediate inference, use of Venn Diagrams and other methods of testing arguments in traditional logic; direct, indirect and conditional proofs, proofs of invalidity, concepts of consistency and inconsistency, identity, relations, and related elements of sentence and predicate logic.

 

Formal logic requires attention, attendance and participation.  I am reasonably forgiving; logic is not.  It will not do to wait until the night before an exam to study.  Logic is notoriously difficult to “cram into your head” in one evening.  Come to class prepared, make sure you have worked out problems and exercises as indicated in class or in the schedule below, and be sure to be ready for quizzes at any time.

 

As the semester progresses, it is inevitable that you will wonder “where you are” grade-wise.  Figure it like this.  Each examination counts as 23% of your grade.  Your grade is based on a total of 1000 points.  Examinations, together, count as 690 points out of 1000 (or 230 points each – to figure out what the value of your exam grade is, take the grade out of 100 (for example, 83/100) and multiply it (83) by 2.3).  Attendance, quizzes and assignments count as 310 points out of 1000.     There will be at least 10 quizzes or 1 per week and at least 5 assignments or one assignment every 2 weeks.  You may drop the lowest 4 quiz grades and the lowest 1 assignment grade.  The average of your quizzes and assignments will be multiplied by 3.1 to result in a number of points from an available 310.  There are NO make-up quizzes or assignments (take-home assignments will not be accepted late).  Make-up examinations are unpleasant for everyone involved, but if you miss an examination for a good, legitimate, and verifiable reason, you may make it up within 3 class meeting days of its initial administration.   

 

---

Grading Scale and Policies

 

A

95-100%

C

74-76.x%

A-

90-94.x%

C-

70-73.x%

B+

87-89.x%

D+

67-69.x%

B

84-86.x%

D

64-66.x%

B-

80-83.x%

D-

60-63.x%

C+

77-79.x%

F

0-59.x%

This on-line schedule will be updated frequently (at least once a week) and will include chapters, chapter topics, links to other information relevant to chapters and topics, and assignments (for a grade and not-for-a-grade), as well as examination dates.  Quizzes and assignments will appear regularly in class and may or may not be listed on the schedule below.  Remember that the schedule below is meant only as a guide.  Changes and alterations in the schedule, scheduled topics, or examination dates may be necessary to facilitate completion of all major sections listed below.  The schedule chart below contains useful information for this course.  Remember to check it often.

Use this link to McGraw-Hill site for tutorials and information on the text The Power of Logic. The link for the Primis website appears several times in the schedule along with other links.

Note:  A first and very important lesson from logic itself.  See 8/29 Assignments.  It reads “Quiz on basic concepts from chapter 1 or chapter 5 in class.”  Unless it is specifically stated to be the case, or is perfectly clear from the context, the word “or” in logic and in ordinary language is to be taken to mean “one or the other, possibly both.”  There are at least two forms of the use of the word “or” in logic.  One of them is the weak, inclusive sense (as in the Assignment note on 8/29) and the other is the strong, exclusive sense.  When you go to a restaurant and the menu indicates that you can have soup or salad with the entrée, don’t expect to have BOTH soup and salad without paying extra.

SCHEDULE

 

Date

Topic

Readings/Chapters

Links: Discussion Board Link

Assignments* and Suggested Problems**

8/20

Introductory information, course requirements, general introduction to logic

 

The Power of Logic

pp. 8-11, Recognizing statements, concepts, validity, soundness and validity.

8/22

Chapter 1: Basic Concepts

Chapter 1, pp. 1-46

 

None

pp. 19-20, counterexamples

8/27

Chapter 1 Continued; Chapter 5: Categorical (Traditional) Logic - Statements

Chapter 1, pp. 1-46 continued

Chapter 5, pp. 46-60 – categorical statements and the square of opposition

The Power of Logic

Symbols for TL

 

Assignment 1 due on Sept. 3:  Link

 

pp. 33-36, Evaluation of Arguments

pp. 42-45, Concepts

 

pp. 51-54, Translations in TL

pp. 57-60, Logical Relationships and Immediate Inferences

8/29

Chapter 5 continued

Chapter 5, pp. 60-68 – forms of immediate inference – conversion, obversion and contraposition

The Power of Logic

 

Quiz on basic concepts from chapter 1 or chapter 5 in class.

 

pp. 65-68, Immediate Inferences

9/3

Chapter 5 continued

Chapter 5, pp. 60-68 continued

Assignment 1 due today – Link

Quiz 1 returned today

9/5

Chapter 6: Arguments in Traditional Logic

Chapter 6, pp. 69-76, Standard Form and Order of Arguments/Syllogisms

The Power of Logic

 

pp. 73-76, Form and Order, Mood and Figure

Quiz on immediate inference in class.

9/10

Chapter 6 continued

Chapter 6, pp. 76-117, Venn Diagrams

 

pp. 84-86, Venn Diagrams

9/12

Chapter 6 continued

Venn Diagrams continued and Chapter 6, pp. 117-123, Rules for Evaluating Syllogisms

 

pp. 93-95, Venn Diagrams

pp. 102-104, Venn Diagrams

pp. 107-108, Enthymemes

pp. 113-116, Venn Diagrams

pp. 121-122, Rules for Testing Syllogisms

9/17

TEST 1 – THIS TEST HAS BEEN MOVED TO 9/24

Review pp. 1-123 and additional information for this exam.

Review is available online.  Use this link.

 

9/19

Traditional Logic continued through 9/24

 

 

 

 

9/24

 

 

 

 

9/26 – 10/1

Chapter 7: Sentence (Statement) Logic

Chapter 7, pp. 124-139, Translation to symbols in SL, Chapter 7, pp. 139-156, Truth Value Determination and Truth Tables/Testing for Validity

Truth Tables

pp. 136-139, Symbolizations

10/1

Chapter 7 continued

Chapter 7, pp. 139-156 continued; pp. 139-156 continued.

The Power of Logic

pp. 146-147, Truth Values

pp. 153-156, Truth Tables – Validity/Invalidity

10/3

Chapter 7 continued

Chapter 7, pp. 156-163, Begin Truth tables and Abbreviated Truth Tables/Proofs of Invalidity

 

Assignment 2 is due on 10/10.  See this link.

 

There is a quiz today on translations in SL and simple truth value determination.

 

pp. 160-163, Abbreviated Truth Tables

10/8

Chapter 7 continued

Chapter 7, pp. 163-170, Truth Tables for Statements: Tautology, Contingency, Contradiction

SL Concepts

Terms and Concepts

pp. 168-170, Truth Tables and Statements

10/10

Chapter 7 continued and Addition of Truth Trees

Chapter 7, pp. 163-170 continued and begin Truth Trees for Testing Validity/Statements

Truth Trees

Arguments and Statements

See pp. 153-156 and use for truth tree problems.

 

Additional translation problems.

10/15

Truth Trees Continued

Truth Trees continued

 

 

10/17

TEST 2, part I***

Review pp. 124-170, truth trees, and additional information for this exam.

Review may be available online.  Watch for a link here.

TEST 2, PART I IS MOVED TO 10/24; COPIES OF THE STUDY GUIDE FOR THE TEXT FOR THE COURSE ARE ON RESERVE IN THE LIBRARY.

10/22

Chapter 8: Sentence Logic Proofs

Chapter 8, pp. 171-187, Direct Proofs Using the Inference Rules

The Power of Logic

 

pp. 181-187, Annotations and Basic Proofs

10/24

Chapter 8 continued

Chapter 8, pp. 171-187 continued

QUIZ 6 AND REVIEW QUESTIONS WITH ANSWERS

 

10/29

Chapter 8 continued

Chapter 8, pp. 187-210, Direct Proofs Using Inference and Equivalence Rules

Rules of Inference and Equivalence

pp. 194-198, Annotations and Intermediate Proofs

10/31

Chapter 8 continued

Chapter 8, pp. 187-210 continued

Proof Instructions

More Proof Instructions

pp. 203-210, Annotations and More Advanced Proofs

11/5

Chapter 8 continued

Chapter 8, pp. 219-229, Indirect Proofs (Reductio Ad Absurdum) (Use pp. 211-218 for additional indirect proof problems)

 

Use problems on pp. 216-219 w/IP

 

pp. 225-229, Indirect Proofs

11/7

Chapter 8 continued

Chapter 8, pp. 219-229 continued

 

 

11/12

TEST 2, part II

Review pp. 124-229 and additional information for this exam.

Review may be available online.  Watch for a link here.

 

11/14

Chapter 9, Predicate Logic

Chapter 9, pp. 236-250, Translations & Quantifiers in PL

The Power of Logic

 

pp. 246-250, Symbols & Translations in PL

11/19

Chapter 9 continued

Chapter 9, pp. 236-250 continued

 

 

11/21

Chapter 9 continued

Chapter 9, pp. 259-288, Quantifier Rules, QN, and Proofs in PL

PL Rules

pp. 273-279, Proofs in PL

11/26

Chapter 9 continued

Chapter 9, pp. 259-288 continued

 

Relational Translations and Arguments are on pp. 288-302 and exercises on 302-306.  Elements of these sections will be incorporated as appropriate.

PL Problems

Answers to “plstuff” files at the following links.  Answers are image files – they will take time to load:

Page 1

Page 2

Page 3

More PL Problems

Answers to More PL Problems at the following links. Answers are image files – they will also take extra time to load:

Page 1

Page 2

 

Quiz 10 answers

pp. 285-288, More Proofs in PL

11/28

Thanksgiving Holiday

 

 

 

12/3, 1:00-2:30 (actual time limit for exam)

TEST 3

Review pp. 236-250, 259-288 and additional information for this exam.

Review may be available online.  Watch for a link here.

 

 

 

 

 

 

 

 

 

 

 

*Assignments or quizzes to be submitted for a grade will appear in bold or otherwise indicated as required/graded elements of the course.

 

**It is impossible to go through all the problems in the text in class.  Answers to selected problems appear in the back of the book and you should take the time to work with other people in the class on sets of problems to study for exams and quizzes.  Some problems from the text will be done in class, others will be added from links in the syllabus and from the content of lectures.

 

***Test 2 is broken down into two parts.  The average of the two parts will constitute the total grade for that test.