About this Course
4.5
148 ratings
22 reviews
100% online

100% online

Start instantly and learn at your own schedule.
Flexible deadlines

Flexible deadlines

Reset deadlines in accordance to your schedule.
Beginner Level

Beginner Level

Hours to complete

Approx. 12 hours to complete

Suggested: 6 hours/week...
Available languages

English

Subtitles: English, Arabic, Spanish, German
100% online

100% online

Start instantly and learn at your own schedule.
Flexible deadlines

Flexible deadlines

Reset deadlines in accordance to your schedule.
Beginner Level

Beginner Level

Hours to complete

Approx. 12 hours to complete

Suggested: 6 hours/week...
Available languages

English

Subtitles: English, Arabic, Spanish, German

Syllabus - What you will learn from this course

Week
1
Hours to complete
15 minutes to complete

Welcome to the Course

<p>Welcome to <b>Think Again: How to Reason Deductively</b>! This course is the second in a series of four courses jointly titled <em>Think Again: How to Reason and Argue</em>. We are excited that you are taking this course, and we hope that you will stick around for all four courses in the series, because there is a great deal of important material to learn.In the series as a whole, you will learn how to evaluate deductive arguments.</p> <p>What is it for a deductive to be “valid”? And how can you tell the difference between deductive arguments that are valid and those that aren’t? In this course, we will answer these questions.</p><p>The first part of this course introduces the series and the course. It also clarifies some peculiarities you may find with this course. We encourage you to watch the "<b>Introduction to the Course</b>" video first as it will help you learn more from the materials that come later. </p>...
Reading
1 video (Total 5 min), 1 reading
Reading1 reading
Course Logistics (Start Here)10m
Hours to complete
3 hours to complete

Propositional Logic and Truth Tables

<p><b>CONTENT</b>: This week we will teach you how such phrases as “and”, “or”, “if”, and “not” can work to guarantee the validity or invalidity of the deductive arguments in which they occur. It will also teach you to understand the functioning of these phrases using a device called a “truth-table”, which shows how the truth or falsity of propositions that use these phrases depends upon the truth or falsity of the propositions contained within it. We highly recommend that you practice the skills that you will learn in this week by doing the puzzles at betapuzzle.sonjara.com.</p><p><b>LEARNING OUTCOMES</b>: By the end of this week’s material you will be able to :<ul><li>define what a deductive argument is</li><li>define what it is for a deductive argument to be valid</li><li>identify truth-functional operators and connectives</li><li>build a truth-table for any truth-functional operator or connective</li></ul></p><p><b>OPTIONAL READING</b>: If you want more examples or more detailed discussions of these topics, we recommend <em>Understanding Arguments, Ninth Edition</em>, Chapter 6. </p>...
Reading
14 videos (Total 109 min), 8 quizzes
Video14 videos
Propositions and Propositional Connectives4m
"And" and the Truth-Functional Connectives10m
Using Truth Tables to Show Validity5m
Rules Variables and Generality12m
Disjunction10m
Combining Conjunctions and Disjunctions6m
Negation and Truth Functional Operators7m
Negating Conjunctions and Disjunctions3m
Commutativity and Associativity10m
The Conditional14m
Conditionals in Ordinary Language3m
Biconditionals7m
Conclusion1m
Quiz8 practice exercises
"And" and the Truth-Functional Connectives4m
Using Truth Tables to Show Validity16m
Disjunction12m
Negation and Truth Functional Operators6m
Negating Conjuctions and Disjunctions14m
The Conditional8m
Conditionals in Ordinary Language8m
Biconditionals6m
Week
2
Hours to complete
3 hours to complete

Categorical Logic and Syllogisms

<p><b>CONTENT</b>: This week will teach you how such phrases as “all”, “some”, and “none” can work to guarantee the validity or invalidity of the deductive arguments in which they occur. It will also teach you to understand the functioning of these phrases using a device called a “Venn Diagram”, which shows how the truth or falsity of propositions that use these phrases depends upon the truth or falsity of other propositions that use these phrases. We highly recommend that you practice the skills that you will learn in this week by doing the puzzles at http://philgames-neta.apps.unc.edu</p><p><b>LEARNING OUTCOMES</b>: By the end of this week’s material you will be able to : <ul><li>understand the information conveyed by a truth-table</li><li>use truth-tables to determine whether a deductive argument is valid</li><li>identify quantifiers and categories</li><li>build a Venn Diagram for any statement using quantifiers or categories</li></ul><p><b>OPTIONAL READING</b>: If you want more examples or more detailed discussions of these topics, we recommend <em>Understanding Arguments</em>, Ninth Edition, Chapter 7. </p>...
Reading
8 videos (Total 84 min), 5 quizzes
Video8 videos
Categories and Quantifiers17m
How Quantifiers Modify Categories9m
Immediate Categorical Inferences10m
Syllogisms9m
Categories, Individuals, and Language4m
Venn Diagrams and Validity13m
Other Ways of Expressing A, E, I, or O Propositions7m
Quiz5 practice exercises
How Quantifiers Modify Categories20m
Immediate Categorical Inferences24m
Syllogisms8m
Categories, Individuals, and Language6m
Venn Diagrams and Validity8m
Week
3
Hours to complete
1 hour to complete

Representing Information

<p><b>CONTENT</b>: This week we will teach you how to use the tools that you’ve learned about in the preceding modules in order to represent information. Information can be communicated in very different ways – by means of different languages or signaling systems – but no matter how that information is communicated, it can be important to use that information in reasoning. In this week, you will learn how to reason from information that is communicated directly by means of truth-tables or Venn Diagrams.</p><p><b>LEARNING OUTCOMES</b>: By the end of this week's material you will be able to: <ul><li>understand the information conveyed by a Venn Diagram</li><li>use Venn Diagram to determine whether a deductive argument is valid</li></p>...
Reading
2 videos (Total 27 min), 1 quiz
Video2 videos
Different Ways of Representing Information11m
Quiz1 practice exercise
Reasoning from Venn Diagrams or Truth Tables Alone16m
Week
4
Hours to complete
1 hour to complete

Catch-Up and Final Quiz

<p>This week gives you time to catch up and review, because we realize that the previous weeks include a great deal of challenging material. It will also be provide enough time to take the final quiz as often as you want, with different questions each time. </p><p>We explain the answers in each exam so that you can learn more and do better when you try the exam again. You may take the quiz as many times as you want in order to learn more and do better, with different questions each time. You will be able to retake the quiz three times every eight hours. You might not need to take more than one version of the exam if you do well enough on your first try. That is up to you. However many versions you take, we hope that all of the exams will provide additional learning experiences. </p>...
Reading
1 quiz
Quiz1 practice exercise
Final Quizs
4.5
22 ReviewsChevron Right

Top Reviews

By HPDec 2nd 2017

Really good course, the material and explanations are good, and even in some cases, resolving or understanding some ideas is challenging, you can get the idea with a little practice

By SMJun 22nd 2017

This entire series was informative, engaging, and fun, and the thinking skills taught are so valuable.

Instructors

Avatar

Dr. Walter Sinnott-Armstrong

Professor
Philosophy
Avatar

Dr. Ram Neta

Professor
Philosophy

About Duke University

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