Critical Thinking and Informal Logic: Core Concepts and Vocabulary Guide

Critical Thinking and Informal Logic subject snapshot

Studies arguments, definitions, evidence, assumptions, fallacies, causal claims, and decision reasoning. This core concepts and vocabulary guide helps a U.S. college learner build a connected concept map and explain essential terms instead of memorizing isolated definitions. Course titles, depth, notation, laboratory rules, and assessment weights differ; the instructor syllabus remains the controlling local source.

Cluster: Humanities, Writing, and Communication. Useful preparation: careful reading, basic probability ideas, writing, and comfort revising beliefs from evidence. Target evidence: an argument map with claim, premises, assumptions, evidence appraisal, objections, and revised conclusion.

How to use this resource

Start with the current syllabus, calendar, required materials, accessibility information, academic-integrity policy, safety rules, and grading method. Mark which ideas are already secure, which require prerequisite repair, and what the instructor accepts as evidence. Use the guide to organize learning—not to guess undisclosed exam questions or replace assigned work.

Core concept 1: argument structure

Define argument structure in the language used by the course, then add a representation, valid example, near-miss, governing relationship, and a question that distinguishes it from definitions and ambiguity. Connect the concept to this subject-wide method: state the claim, map reasons and assumptions, evaluate source and inference, consider alternatives, and calibrate the conclusion.

Core concept 2: definitions and ambiguity

Define definitions and ambiguity in the language used by the course, then add a representation, valid example, near-miss, governing relationship, and a question that distinguishes it from inductive strength. Connect the concept to this subject-wide method: state the claim, map reasons and assumptions, evaluate source and inference, consider alternatives, and calibrate the conclusion.

Core concept 3: inductive strength

Define inductive strength in the language used by the course, then add a representation, valid example, near-miss, governing relationship, and a question that distinguishes it from causal reasoning. Connect the concept to this subject-wide method: state the claim, map reasons and assumptions, evaluate source and inference, consider alternatives, and calibrate the conclusion.

Core concept 4: causal reasoning

Define causal reasoning in the language used by the course, then add a representation, valid example, near-miss, governing relationship, and a question that distinguishes it from bias and fallacies. Connect the concept to this subject-wide method: state the claim, map reasons and assumptions, evaluate source and inference, consider alternatives, and calibrate the conclusion.

Core concept 5: bias and fallacies

Define bias and fallacies in the language used by the course, then add a representation, valid example, near-miss, governing relationship, and a question that distinguishes it from argument structure. Connect the concept to this subject-wide method: state the claim, map reasons and assumptions, evaluate source and inference, consider alternatives, and calibrate the conclusion.

Build the concept network

Draw arrows among the five concepts and label every connection with a verb such as causes, constrains, represents, measures, transforms, supports, or contradicts. Add Audit a causal claim by testing timing, mechanism, comparison, confounding, selection, and plausible alternative explanations. and mark which concepts are necessary at each decision. Rebuild the map from memory two days later and correct it against approved course sources.

Accessibility, integrity, and safety

Use approved accommodations and accessible formats early. Follow laboratory, clinical, field, studio, technology, privacy, human-subject, copyright, and professional-scope rules. Cite source and tool use as required. Never use this guide to bypass assessment rules, perform unauthorized security testing, make a diagnosis, or provide individualized legal, medical, financial, or safety instructions.

Instructor or tutor conference questions

• Which two concepts create the greatest prerequisite bottleneck in this section?
• What does a complete explanation include beyond the final answer?
• Which errors require immediate correction before the next unit?
• What practice best matches the actual assessment format without revealing protected questions?
• Which approved source or office should resolve a changing rule, safety issue, or accommodation need?

Related Humanities subject guides

Critical Thinking and Informal Logic — Core Concepts and Vocabulary Guide · Introduction to Ethics — Core Concepts and Vocabulary Guide · United States History — Core Concepts and Vocabulary Guide

Open-learning reference and editorial boundary

Use the Humanities open-learning catalog, OpenStax subject library, and MIT OpenCourseWare only when they fit the instructor’s scope and license terms. This is an original independent Exams.fit study guide; it does not reproduce textbooks, guarantee a grade, predict protected exam questions, or replace the current syllabus, instructor, laboratory manual, clinical protocol, institutional policy, or qualified professional. Reviewed August 2, 2026.