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Critical Thinking and Logical Fallacies

Sep 1, 2025

Overview

This lecture introduces the importance of critical thinking, particularly logical fallacies and cognitive biases, providing clear definitions, numerous examples, and practical applications for everyday life, relationships, and faith discussions.

Why Critical Thinking Matters

  • Critical thinking makes arguments more coherent and helps identify poor reasoning.
  • Lack of critical thinking affects relationships, politics, and religious discussions.
  • Critical thinking involves evaluating arguments objectively, not being critical of people.
  • Learning to recognize fallacies helps prevent being misled and improves personal reasoning.

Key Logical Fallacies Explained

  • Straw Man: Misrepresenting or exaggerating someone's argument to make it easier to attack.
  • Ad Hominem: Attacking a person's character instead of addressing the argument.
  • False Dilemma (Either/Or): Presenting only two choices when more exist.
  • Slippery Slope: Claiming one small step will inevitably lead to a chain of negative events.
  • No True Scotsman: Dismissing examples that don’t fit a definition by arbitrarily redefining the category.
  • Equivocation: Changing the meaning of a key word during an argument.
  • Appeal to Emotion: Using emotions rather than valid logic to persuade (e.g., guilt, fear).
  • Hasty Generalization: Drawing broad conclusions from a small or unrepresentative sample.
  • Post Hoc (False Cause): Assuming that because one thing happened before another, it caused it.

Understanding Cognitive Biases

  • Confirmation Bias: Favoring information that confirms pre-existing beliefs and ignoring contrary evidence.
  • Biases are natural but recognizing them helps slow down thinking and improve judgment.

Application and Motivation

  • Emotionalism and relativism can hinder understanding and honest dialogue.
  • Group identity and tribalism can cloud individual reasoning.
  • Being open to questioning and seeking truth strengthens faith and understanding.

Key Terms & Definitions

  • Critical Thinking β€” Careful, objective analysis of arguments and ideas.
  • Logical Fallacy β€” An error in reasoning that weakens an argument.
  • Cognitive Bias β€” A mental shortcut or tendency that affects objective judgment.
  • Straw Man Fallacy β€” Distorting an argument to refute it easily.
  • Ad Hominem β€” Attacking the person instead of their argument.
  • Equivocation β€” Using ambiguous language to mislead.
  • Confirmation Bias β€” Preferring information that supports existing beliefs.
  • Post Hoc Fallacy β€” Assuming causation from sequential events.

Action Items / Next Steps

  • Take the free quiz on logical fallacies at filteritthrough.com/quiz.
  • Practice identifying fallacies in daily conversations, media, and arguments.
  • Reflect on personal biases and aim to question assumptions.
  • Encourage open-minded discussions with the goal of finding truth.