Traditional critical thinking texts neglect two crucial facts. First, as psychologists have shown, many of our mistakes are caused not by faulty formal reasoning but because we bypass it in favor of intuitive, often unreliable heuristics. Second, good critical thinking requires not only the proper assessment of inference but also of our premises: the evaluation of information sources is of fundamental importance, especially in this internet era of fake news and politicized science.

This highly innovative text is psychologically informed, both in its diagnosis of inferential errors and in teaching students how to watch out for, and circumnavigate, their natural intellectual blind spots. It also incorporates insights from epistemology and philosophy of science to formulate best practices for assessing information sources on the internet and other media. The result is a practical, hands-on primer for real-world critical thinking.

The authors bring more than five combined decades of classroom experience to the subject, covering the usual core topics of deductive, inductive, causal, and probabilistic inference, argument identification, reconstruction, and diagramming, while also extending the text’s scope to include testimony, the nature and credibility of science, rhetoric, and dialectical argumentation.

The Second Edition further develops and refines these innovations, combining in-depth discussion of “fake news” and conspiracy theories with exercises and projects designed to teach broadly applicable source assessment skills. There is also a more nuanced positive account of science that emphasizes its continuity with commonsense causal reasoning. For instructors, there are additional online resources, notably banks of exam questions with solutions and various class projects.

Key Features:

Uses contemporary psychological explanations and remedies for pervasive errors in belief formation. No other critical thinking text generally applies this psychological approach
Rigorously addresses the evaluation of premises based on testimony, in particular the testimony of internet sources
Carefully explains the concept of validity, paying particular attention to distinguishing logical possibility from other species of possibility
Uses frequency trees as a simple and reliable alternative to more complicated Bayesian methods
Uses arguments maps, which improve students’ reasoning and argument evaluation

Key Updates to the Second Edition:

Expanded discussion of the psychology of reasoning and belief, including treatment of motivated reasoning
Uses a conventional truth-table–based approach to propositional logic while incorporating a more intuitive, psychologically informed approach to the logic of conditionals
New Summary Boxes
Enhanced treatment of testimony, with an expanded discussion of fake news, conspiracy theories, and the application of general epistemic principles to navigate the extremes of gullibility and unmotivated skepticism.
New exercises that emphasize practical, hands-on source assessment skills
An improved discussion of the nature of science emphasizing the central role of causal inference and the multi-generational, cumulative character of scientific knowledge
A new Index of Arguments, summarizing the most common argument forms and associated defeaters for the inductive forms
New online content, including exams and additional questions (plus solutions), suitable for upload to course management software (e.g., Blackboard, etc.)

For online resources for students and instructors, use the Instructor & Student Resources and Support Material links below.

About the Author

Jack Lyons is Professor of Philosophy and Chair of Logic and Rhetoric at the University of Glasgow.

Barry Ward is Professor of Philosophy at the University of Arkansas.

"About this title" may belong to another edition of this title.

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