PASSPOINTPRO | D265 CRITICAL THINKING
PASSPOINTPRO
WGU D265
Critical Thinking: Reason and Evidence
COMPLETE STUDY GUIDE
Coverage: Argument quality • Source credibility • Bias and its impact • Evidence-based claims • Logical
fallacies • Statistics • 40 practice questions
Concept Review • Worked Examples • Exam Strategy • Answer Explanations
Comprehensive Study Guide • Page 1
,PASSPOINTPRO | D265 CRITICAL THINKING
How to Use This Guide
This guide is organized around the four broad abilities emphasized in D265: evaluating arguments,
evaluating source credibility, explaining bias, and making claims supported by evidence. Read each
competency section once for understanding, then return to the quick-reference tables and practice
questions for retrieval practice.
• Preview the competency map and mark topics you already understand.
• Study one major competency at a time. After each subsection, explain the idea without looking at
the page.
• Work the examples by identifying the claim, evidence, reasoning, and possible weakness.
• Complete the 40-question practice check without using the answer key.
• Review every explanation, including questions you answered correctly, and revisit weak topics.
High-yield rule: Do not answer from whether you agree with a topic. Evaluate how the conclusion is
supported, whether the evidence is credible, and whether bias or a fallacy weakens the reasoning.
Competency Map
Competency What You Must Be Able to Do High-Yield Topics
1. Argument Quality Identify, classify, and evaluate arguments. Claims, premises, conclusions, validity, soundness,
strength, cogency, fallacies
2. Source Credibility Judge whether evidence deserves Expertise, reliability, conflicts of interest,
confidence. corroboration, research design, statistics
3. Bias and Impact Recognize systematic distortions in Confirmation, availability, anchoring, framing,
judgment. groupthink, self-serving bias
4. Evidence-Based Construct appropriately qualified Claim types, warrants, objections, rebuttals, burden
Claims conclusions. of proof, evidence sufficiency
Comprehensive Study Guide • Page 2
,PASSPOINTPRO | D265 CRITICAL THINKING
A Practical 7-Day Review Plan
Day Focus Active Study Task
1 Foundations and argument Standardize 10 short passages into premises and conclusions.
anatomy
2 Deductive and inductive Classify arguments and test validity, soundness, strength, and cogency.
evaluation
3 Fallacies and argument Identify the precise reasoning error in 15 examples.
mapping
4 Sources and evidence Evaluate five articles using the credibility checklist.
5 Bias Match real-life decisions to likely biases and choose a mitigation.
6 Evidence-based claims Build three arguments with a claim, evidence, warrant, objection, and rebuttal.
7 Practice and repair Complete the practice check, analyze errors, and review the final checklist.
Daily Study Session Template
• Recall: spend five minutes writing key ideas from memory before opening the guide.
• Learn: study one focused subsection and work through its example.
• Apply: create or solve three new scenarios using the concept.
• Repair: record mistakes in an error log and write the correct decision rule.
Progress check: At the end of each day, rate each topic: 1 = unfamiliar, 2 = recognize it, 3 = can explain it, 4
= can apply it accurately in a new scenario.
Comprehensive Study Guide • Page 3
, PASSPOINTPRO | D265 CRITICAL THINKING
D265 COMPETENCY
1. Evaluating Argument Quality
Understand what an argument is, how it is structured, and what makes its
reasoning succeed or fail.
Mastery target: Explain the concept in your own words, identify it in a scenario, compare it with close
alternatives, and apply it to a new argument.
1.1 Critical Thinking Foundations
Critical thinking is the disciplined process of interpreting information, analyzing relationships, evaluating
reasons and evidence, drawing proportionate conclusions, and revising a judgment when better
information appears. It is not habitual doubt, argumentativeness, or simply having an opinion.
• Clarity: What exactly is being claimed?
• Accuracy: Is the information true or well supported?
• Relevance: Does the reason bear on the conclusion?
• Depth: Does the reasoning address important complications?
• Breadth: Does it consider credible alternative viewpoints?
• Logic: Do the reasons actually support the conclusion?
• Fairness: Are competing positions represented honestly?
Exam lens: The best answer usually names the specific feature of reasoning at issue. Prefer “the evidence
is not representative” over a vague response such as “the argument is bad.”
1.2 Statements, Propositions, and Claims
A proposition is the meaning expressed by a declarative sentence and is capable of being true or false. A
claim is a proposition asserted as true. Different sentences can express the same proposition, and the
same sentence can express different propositions when context changes.
Comprehensive Study Guide • Page 4
PASSPOINTPRO
WGU D265
Critical Thinking: Reason and Evidence
COMPLETE STUDY GUIDE
Coverage: Argument quality • Source credibility • Bias and its impact • Evidence-based claims • Logical
fallacies • Statistics • 40 practice questions
Concept Review • Worked Examples • Exam Strategy • Answer Explanations
Comprehensive Study Guide • Page 1
,PASSPOINTPRO | D265 CRITICAL THINKING
How to Use This Guide
This guide is organized around the four broad abilities emphasized in D265: evaluating arguments,
evaluating source credibility, explaining bias, and making claims supported by evidence. Read each
competency section once for understanding, then return to the quick-reference tables and practice
questions for retrieval practice.
• Preview the competency map and mark topics you already understand.
• Study one major competency at a time. After each subsection, explain the idea without looking at
the page.
• Work the examples by identifying the claim, evidence, reasoning, and possible weakness.
• Complete the 40-question practice check without using the answer key.
• Review every explanation, including questions you answered correctly, and revisit weak topics.
High-yield rule: Do not answer from whether you agree with a topic. Evaluate how the conclusion is
supported, whether the evidence is credible, and whether bias or a fallacy weakens the reasoning.
Competency Map
Competency What You Must Be Able to Do High-Yield Topics
1. Argument Quality Identify, classify, and evaluate arguments. Claims, premises, conclusions, validity, soundness,
strength, cogency, fallacies
2. Source Credibility Judge whether evidence deserves Expertise, reliability, conflicts of interest,
confidence. corroboration, research design, statistics
3. Bias and Impact Recognize systematic distortions in Confirmation, availability, anchoring, framing,
judgment. groupthink, self-serving bias
4. Evidence-Based Construct appropriately qualified Claim types, warrants, objections, rebuttals, burden
Claims conclusions. of proof, evidence sufficiency
Comprehensive Study Guide • Page 2
,PASSPOINTPRO | D265 CRITICAL THINKING
A Practical 7-Day Review Plan
Day Focus Active Study Task
1 Foundations and argument Standardize 10 short passages into premises and conclusions.
anatomy
2 Deductive and inductive Classify arguments and test validity, soundness, strength, and cogency.
evaluation
3 Fallacies and argument Identify the precise reasoning error in 15 examples.
mapping
4 Sources and evidence Evaluate five articles using the credibility checklist.
5 Bias Match real-life decisions to likely biases and choose a mitigation.
6 Evidence-based claims Build three arguments with a claim, evidence, warrant, objection, and rebuttal.
7 Practice and repair Complete the practice check, analyze errors, and review the final checklist.
Daily Study Session Template
• Recall: spend five minutes writing key ideas from memory before opening the guide.
• Learn: study one focused subsection and work through its example.
• Apply: create or solve three new scenarios using the concept.
• Repair: record mistakes in an error log and write the correct decision rule.
Progress check: At the end of each day, rate each topic: 1 = unfamiliar, 2 = recognize it, 3 = can explain it, 4
= can apply it accurately in a new scenario.
Comprehensive Study Guide • Page 3
, PASSPOINTPRO | D265 CRITICAL THINKING
D265 COMPETENCY
1. Evaluating Argument Quality
Understand what an argument is, how it is structured, and what makes its
reasoning succeed or fail.
Mastery target: Explain the concept in your own words, identify it in a scenario, compare it with close
alternatives, and apply it to a new argument.
1.1 Critical Thinking Foundations
Critical thinking is the disciplined process of interpreting information, analyzing relationships, evaluating
reasons and evidence, drawing proportionate conclusions, and revising a judgment when better
information appears. It is not habitual doubt, argumentativeness, or simply having an opinion.
• Clarity: What exactly is being claimed?
• Accuracy: Is the information true or well supported?
• Relevance: Does the reason bear on the conclusion?
• Depth: Does the reasoning address important complications?
• Breadth: Does it consider credible alternative viewpoints?
• Logic: Do the reasons actually support the conclusion?
• Fairness: Are competing positions represented honestly?
Exam lens: The best answer usually names the specific feature of reasoning at issue. Prefer “the evidence
is not representative” over a vague response such as “the argument is bad.”
1.2 Statements, Propositions, and Claims
A proposition is the meaning expressed by a declarative sentence and is capable of being true or false. A
claim is a proposition asserted as true. Different sentences can express the same proposition, and the
same sentence can express different propositions when context changes.
Comprehensive Study Guide • Page 4
