Intro to Logical Fallacy

Logical Fallacies Introduction

Definition of Logical Fallacy

A logical fallacy is an error in reasoning.
These flawed statements often sound credible but are misleading.
Fallacious reasoning can damage the credibility of an argument if identified by the reader.

Origins of the Term

The term "fallacy" comes from the Latin word fallere, meaning "to deceive, to trip, to lead into error or to trick."
It also derives from the Greek word phelos, which translates to "deceitful."

Importance of Studying Logical Fallacies

Developing the ability to detect logical fallacies is crucial for improving one’s own writing and evaluating the arguments of others.
This skill is likened to "intellectual kung-fu," representing a form of intellectual self-defense.

Types of Logical Fallacies

The following are brief explanations of 15 common logical fallacies:

1. Bandwagon Approach

This argument suggests that something must be true or good because many people believe or are doing it.
Example: "90 percent of computer users choose Macs, so they must be better."

2. Slippery Slope

A fallacy suggesting that a minor action will lead to severe consequences.
Example: "If you don’t stop smoking, you’ll eventually start using heroin."

3. Appeals to Authority

This fallacy cites a celebrity or authority figure outside their realm of expertise to support an argument.
Example: "Katie Perry thinks the killer should be pardoned." (which represents a false authority)

4. Card Stacking

A fallacy of omission where important evidence is excluded to support a predetermined viewpoint.

5. Hasty Generalizations

Making broad conclusions based on insufficient evidence.
Example: "The last two mass murderers were from Michigan, so all Michiganders are dangerous."

6. Begging the Question

This is a circular argument where a proposition is supported by its own premise.
Example: "Chocolate is healthy because it is good for you."

7. Straw Man

A distraction fallacy where an irrelevant conclusion is drawn instead of engaging with the actual argument.
Example: "How could he cheat on his taxes? He’s such a great father!"

8. Appeals to Pity

This fallacy uses emotional appeals to divert attention from the truth of an argument.

9. Ad Hominem

An argument attacking a person’s character rather than their argument.
Example: "How could Mary know anything about cars? She’s a woman!"

10. Non sequitur

A conclusion that does not logically follow from the premises.
Example: "Men are human. Mary is human. Therefore, Mary is a man."

11. Guilt by Association

This fallacy creates a false connection between two unrelated events or individuals.
Example: Associating the events of 9/11 with the Sandy Hook shooting without context.

12. Faulty Cause/Effect

Confusing correlation with causation.
Example: "We’ve been in business for 50 years—therefore, we must be the best!"

13. False Needs

Implies that to fulfill a desire, one must purchase unnecessary products.
Example: "To have intelligent children, parents must buy Baby Mozart!"

14. Either/Or Fallacy (False Dilemma)

Presents a situation as having only two alternatives when there may be others.
Example: "You’re either part of the solution or part of the problem."

15. Post Hoc

Argues that if event A occurs before event B, A must be the cause of B.
Example: "The rooster crowed, and then the sun came up. Therefore, the rooster made the sun rise."

Interactive Activity

A quiz on logical fallacies will take place on Friday!
Students are encouraged to find examples of logical fallacies from various sources by Thursday.

Conclusion

Always be vigilant for faulty reasoning.
Completing the activity and taking notes indicates a strong understanding of logical fallacies!