Debates Master
Presumption FallacyPost Hoc Ergo Propter HocRhetorical Impact: 8/10

Post Hoc Ergo Propter Hoc

Falsely concluding that because event Y occurred chronologically after event X, event X must have caused event Y, confusing temporal sequence with genuine causality.

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Formal Logic Architecture

Event X occurred. Then Event Y occurred. Therefore, Event X caused Event Y.

Real-World Tournament Debate Dialogue Example

Speaker: 'Three months after the city installed high-speed broadband in local libraries, youth crime rates dropped by 12%. Therefore, fast fiber-optic internet prevents delinquency.'

Adjudication Breakdown: The speaker assumes internet installation caused the crime drop while ignoring confounding variables such as new policing tactics, seasonal shifts, or employment incentives.

3 Championship Counter-Tactics

  • Explain the correlation vs causation distinction: 'Chronological sequence does not equal causal consequence.'
  • Introduce confounding variables: 'What role did summer youth employment programs and police patrols play during that exact quarter?'

Explore More Logical Fallacies

Relevance

Straw Man Fallacy

Misrepresenting, oversimplifying, or caricaturing an opponent's argument to make it easier to attack, refute, and dismiss, while ignoring their actual claims.

Relevance

Ad Hominem (Personal Attack)

Attacking the character, motives, intelligence, background, or identity of the person making an argument rather than evaluating the empirical facts and logical warrants of the argument itself.

Presumption

Slippery Slope Fallacy

Asserting without evidentiary proof that a relatively modest initial action or policy step will trigger an inevitable, catastrophic chain reaction of extreme consequences.