Deductive arguments are supposed to be valid in the sense that the premises guarantee that the conclusion is true. In this course, you will learn how to use truth-tables and Venn diagrams to represent the information contained in the premises and conclusion of an argument so that you can determine whether or not the argument is deductively valid.
Ce cours fait partie de la Spécialisation Introduction to Logic and Critical Thinking
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Spécialisation Introduction to Logic and Critical ThinkingUniversité DukeÀ propos de ce cours
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Résultats de carrière des étudiants
20%
ont bénéficié d'un avantage concret dans leur carrières grâce à ce cours
Certificat partageable
Obtenez un Certificat lorsque vous terminez
100 % en ligne
Commencez dès maintenant et apprenez aux horaires qui vous conviennent.
Cours 2 sur 4 dans le
Dates limites flexibles
Réinitialisez les dates limites selon votre disponibilité.
Niveau débutant
Approx. 13 heures pour terminer
Anglais
Sous-titres : Arabe, Français, Portugais (européen), Chinois (simplifié), Italien, Vietnamien, Coréen, Allemand, Russe, Turc, Anglais, Espagnol
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Université Duke
Duke University has about 13,000 undergraduate and graduate students and a world-class faculty helping to expand the frontiers of knowledge. The university has a strong commitment to applying knowledge in service to society, both near its North Carolina campus and around the world.
Programme du cours : ce que vous apprendrez dans ce cours
15 minutes pour terminer
Welcome to the Course
Welcome to Think Again: How to Reason Deductively! This course is the second in the specialization Introduction to Logic and Critical Thinking, based on our original Coursera course titled Think Again: How to Reason and Argue. 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. 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. 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 "Introduction to the Specialization" video first as it will help you learn more from the materials that come later.
15 minutes pour terminer
1 vidéo (Total 5 min), 1 lecture
1 vidéo
1 lecture
Course Logistics (Start Here)10 min
6 heures pour terminer
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>
6 heures pour terminer
14 vidéos (Total 109 min)
14 vidéos
Propositions and Propositional Connectives4 min
"And" and the Truth-Functional Connectives10 min
Using Truth Tables to Show Validity5 min
Rules Variables and Generality12 min
Disjunction10 min
Combining Conjunctions and Disjunctions6 min
Negation and Truth Functional Operators7 min
Negating Conjunctions and Disjunctions3 min
Commutativity and Associativity10 min
The Conditional14 min
Conditionals in Ordinary Language3 min
Biconditionals7 min
Conclusion1 min
8 exercices pour s'entraîner
"And" and the Truth-Functional Connectives30 min
Using Truth Tables to Show Validity30 min
Disjunction30 min
Negation and Truth Functional Operators30 min
Negating Conjuctions and Disjunctions30 min
The Conditional30 min
Conditionals in Ordinary Language30 min
Biconditionals30 min
4 heures pour terminer
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>
4 heures pour terminer
8 vidéos (Total 84 min)
8 vidéos
Categorical Logic10 min
Categories and Quantifiers17 min
How Quantifiers Modify Categories9 min
Immediate Categorical Inferences10 min
Syllogisms9 min
Categories, Individuals, and Language4 min
Venn Diagrams and Validity13 min
Other Ways of Expressing A, E, I, or O Propositions7 min
5 exercices pour s'entraîner
How Quantifiers Modify Categories30 min
Immediate Categorical Inferences30 min
Syllogisms30 min
Categories, Individuals, and Language30 min
Venn Diagrams and Validity30 min
1 heure pour terminer
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>
1 heure pour terminer
2 vidéos (Total 27 min)
2 vidéos
Different Ways of Representing Information11 min
1 exercice pour s'entraîner
Reasoning from Venn Diagrams or Truth Tables Alone30 min
1 heure pour terminer
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>
1 heure pour terminer
1 exercice pour s'entraîner
Final Quiz30 min
Avis
Meilleurs avis pour THINK AGAIN II: HOW TO REASON DEDUCTIVELY
par MW21 août 2019
Compared to Think Again I, this II is more abstract and difficult. it takes more time to grasp the knowledge. and there are still things that I am confused about, despite having passed the final quiz.
par GP12 juil. 2020
The quizzes were a bit difficult because some of the items weren't discussed well in the lectures. It would be better if there were more comprehensive explanations to the answers in the quizzes
par RR6 juin 2020
While still a very useful course, the material was less interesting to me personally than the first module. However it was still very rewarding and I enjoyed the instructor's lectures!
par TF19 févr. 2020
Somewhat confusing at certain points. The explanations don't exactly track the exercises that follow it. However, it is overall a useful course.
À propos du Spécialisation Introduction to Logic and Critical Thinking
By taking Introduction to Logic and Critical Thinking you will improve your ability to identify, analyze, and evaluate arguments by other people (including politicians, used car salesmen, and teachers) and also to construct arguments of your own in order to convince others and to help you decide what to believe or do. This specialization introduces general standards of good reasoning and offers tools to improve your critical thinking skills. These skills will help you determine when an argument is being given, what its crucial parts are, and what it assumes implicitly. You will also learn how to apply deductive and inductive standards for assessing arguments and how to detect and avoid fallacies.
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