Critical Reasoning Course

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Critical reasoning is the skill of reasoning logically and systematically in order to make our reasoning better, more clear, more accurate, or more defensible.

The Western logic, deductive and inductive arguments, syllogisms, formal fallacies, informal fallacies, agreeing and disagreeing, buddhist logic—with many examples and brain teasers.

Course level: Beginner-Intermediate-Advanced. This course is an introduction to critical reasoning and logic. Most of the text is at beginner level, though requiring attentive reading; some parts are more demanding; a few passages and footnotes are for the advanced reader. Critical reasoning is essential for all students of any subect-matter. This is the course you can (and should) take independently of your interests. The test is at beginner level focusing on the fundamental principles of critical reasoning.

This course is under review. DO NOT ENROLL YET.

Content of the book and course

Think Out Of The Box Cover

“Think Out Of The Box” by Roger Abrantes

Chapter 1 Introduction.
Chapter 2 Critical Reasoning.
Chapter 3 Arguments — Deductive and Inductive.
Chapter 4 Deductive Arguments – Categorical Syllogisms.
Chapter 5 Formal Fallacies.
Chapter 6 Valid Inductive Arguments.
Chapter 7 Informal Fallacies.
Chapter 8 Agreeing, Disagreeing, and Agreeing on Disagreeing.
Chapter 9 Buddhist Logic.
Chapter 10 Line of Argumentation.
Solution to Brainteasers.


This is a course under review. We are right now finalizing the textbook “Think Out Of The Box–A Guide To An Open And Critical Mind” that Dr. Abrantes wrote specially for this course. The course will be soon available for you to take. Please, keep an eye on this page. DO NOT ENROLL YET.

One-on-one online tutoring

Read the book(s). If you have any question, please click “Contact Course Teacher.” Your teacher will answer your question as soon as possible.

Once you’re ready for it, take the test. You may take a test as many times as you like. We recommend you re-take tests once a year as a self-imposed quality control.


Critical Reasoning Lesson

Length: 36 minutesAuthor: Roger AbrantesComplexity: Hard

Critical reasoning, deductive and inductive arguments, categorical syllogisms, formal fallacies, valid inductive arguments, informal fallacies, agreeing, disagreeing, and agreeing on disagreeing, Buddhist logic, line of argumentation.