PHIL 252 Unit 1 — Why Critical Thinking
Core Argument of This Unit
Critical thinking is not a talent you either have or don’t — it is a disciplined practice of improving how you form and evaluate beliefs. The unit answers “What should I believe?” with two rules: believe what is true, and believe what you have reason to believe.
Key Ideas
What critical thinking is: Thinking that is “disciplined by being guided by principles of good method.” It is self-directed, self-disciplined, self-monitored, and self-corrective. The word “critical” comes from Greek kriticos (discerning judgement) — it is not about being negative but about making well-founded judgements.
Beliefs as maps: We can’t simply choose our beliefs — beliefs are formed by evidence and function like a map of the world. The map is adequate based on how well it helps us navigate reality. We can improve our belief-forming processes even if we can’t directly choose beliefs.
Language and misleading communication: Language allows manipulation of others’ beliefs without outright lying. Key tactics:
- Implicature: the gap between a sentence’s literal meaning and what it’s used to mean
- Paltering: misleading someone using technically true statements
- Weasel Wording: exploiting implicature to avoid responsibility (e.g., calling wealthy donors “job creators”)
- Brandolini’s Principle: it takes far more energy to refute bullshit than to produce it
Bullshit (intro): Claims intended to distract, confuse, or mislead — distinct from lying because bullshit involves indifference to truth. Requires a Theory of Mind (understanding others have perspectives).
Features of a Good Critical Thinker
- Good language mastery
- Provides enough information for others to evaluate claims
- Good at reconstructing and analyzing arguments
- Holds an open and skeptical mind
- Genuine curiosity and inquisitiveness
- Motivated to improve their thinking
Key Terms
| Term | Definition |
|---|---|
| Paltering | Misleading without outright lying |
| Implicature | What a sentence is used to mean vs. what it literally means |
| Weasel Wording | Exploiting implicature gap to avoid responsibility |
| Brandolini’s Principle | Refuting bullshit requires far more energy than producing it |
| Fallacy | A form of argument that is invalid or violates a relevance condition |
Unit’s Place in the Course
This unit establishes the why of critical thinking. Units 2–6 build the how: formal tools for argument, validity, definition, categorical logic, and fallacy detection.
Foundational for Unit 7
- Belief — the nature of belief and how it’s formed is the baseline for understanding inductive/scientific reasoning
- CriticalThinking — the attitudes cultivated here (skepticism, open-mindedness) are what scientific method formalizes
- Brandolini’s Principle matters for evaluating scientific claims in a data-saturated environment