Critical Thinking Tools
Analyze arguments, detect fallacies, and improve your reasoning with our suite of AI-powered tools.
Pro adds Writing Lab, longer analyses, unlimited quizzes & more. See Pro features & pricing
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Free
Fallacy Finder
Paste any text and instantly identify logical fallacies. Get explanations and learn how to avoid them.
Up to 750 characters
Links to fallacy pages
Try Fallacy Finder
Free
Bias Checker
Analyze text for cognitive biases that may be influencing the reasoning. Understand how biases affect arguments.
Up to 750 characters
30+ cognitive biases
Try Bias Checker
Free
Fallacy Quiz
Test your knowledge with interactive quizzes. Identify fallacies in example arguments and track your progress.
Multiple difficulty levels
3 free quizzes per day
Take a Quiz
Pro
Writing Lab
Write essays and arguments, then analyze them for fallacies and biases. Save your work and track your reasoning score.
On-demand analysis
Save unlimited documents
Export to PDF/Word
Reasoning score
Upgrade to Pro — $8/mo
Educator Resources
Lesson plans, worksheets, slide decks, and classroom activities for teaching critical thinking and logical fallacies.
Lesson plans
Slide decks
Worksheets
Discussion guides
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