wunder beta🧩 Logic & Fallacies
Spot the reasoning traps that fool smart people every single day.
What you’ll learn
- Define what a logical fallacy is and recognize ad hominem, straw man, and false dilemma in real arguments.A logical fallacy is a reasoning error that can still feel persuasive. Ad hominem attacks the person, straw man distorts an opponent's view, and false dilemma offers only two options when more exist. Naming these errors is the first step to resisting them.
- Identify slippery slope, appeal to authority, circular reasoning, and false cause, and test claims for hidden variables.Slippery slope asserts an unsupported cascade, weak appeals to authority rely on irrelevant experts, and circular reasoning assumes its own conclusion. The false cause fallacy mistakes correlation for causation; sound reasoning demands independent evidence and rules out lurking common factors.
Questions this course answers
Attacking a person's character instead of their argument is which fallacy?
Ad hominem attacks the arguer rather than the argument; a person's flaws do not make their claim false.
Refuting a distorted, exaggerated version of someone's position is called a what?
A straw man misrepresents an opponent's view as weaker or more extreme so it is easier to knock down.
'You are either with us or against us' is an example of which fallacy?
A false dilemma presents only two options when more actually exist, hiding the middle ground.
Claiming one small step will inevitably cause a chain of disasters, without evidence, is which fallacy?
A slippery slope asserts an unsupported cascade of worsening outcomes to trigger fear of the extreme endpoint.
An argument whose conclusion is quietly assumed in its own premises commits which fallacy?
Circular reasoning (begging the question) assumes the conclusion within the premises, so it proves nothing.
Ice cream sales and drownings both rise in summer, but neither causes the other. This warns against assuming what?
Correlation does not prove causation; a hidden common factor (hot weather) can explain why two things rise together.
Grounded in trusted sources
- Internet Encyclopedia of Philosophy, 'Fallacies' (https://iep.utm.edu/fallacy/)
- Purdue Online Writing Lab, 'Logical Fallacies' (https://owl.purdue.edu/)
- UNC Chapel Hill Writing Center, 'Fallacies' (https://writingcenter.unc.edu/tips-and-tools/fallacies/)
- Douglas Walton, Informal Logic: A Pragmatic Approach (Cambridge University Press, 2008)
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