Non sequitur

Logical fallacy

For other uses, see Non sequitur (disambiguation).

A non sequitur (Latin for "it does not follow") is a logical fallacy where a conclusion or statement does not logically follow from the previous argument or statement. In formal logic, it refers to an argument in which the conclusion does not follow from the premises. Non sequiturs are often used for comedic effect in literature, television, and film, but they can also be used in more serious contexts to illustrate flawed reasoning.

Types of Non Sequitur

Non sequiturs can be categorized into several types, including:

• Affirming the consequent: This occurs when someone assumes that if "A" leads to "B", then "B" must lead to "A". For example, "If it rains, the ground will be wet. The ground is wet, so it must have rained."
• Denying the antecedent: This fallacy occurs when someone assumes that if "A" leads to "B", then the absence of "A" means the absence of "B". For example, "If it rains, the ground will be wet. It did not rain, so the ground is not wet."
• Irrelevant conclusion: This occurs when an argument that is supposed to prove something instead proves something else. For example, "People like to walk on the beach. Beaches have sand. Therefore, having sand floors in homes would be a great idea."

Examples in Media

Non sequiturs are often used in comedy to create absurd or humorous situations. For example, in the television show Family Guy, characters often make statements or perform actions that are completely unrelated to the preceding dialogue or situation, creating a comedic effect.

Related Logical Fallacies

Non sequiturs are related to other logical fallacies, including:

• Ad hominem
• Straw man
• Red herring
• Slippery slope
• False dilemma

See Also

• Logic
• Fallacy
• Argument
• Critical thinking
• Deductive reasoning
• Inductive reasoning

References

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