advertisement

# Valid & Fallacious Reasoning

25 %
75 %
advertisement
Information about Valid & Fallacious Reasoning
Education

Published on March 11, 2014

Author: msbeaulieu

Source: slideshare.net

## Description

Covers what valid and fallacious reasoning is, and the common types of fallacious reasoning.
advertisement

Author’s Reasoning: Valid and Fallacious English I Beaulieu Hall Dale High School Monday, March 5, 14

Valid Reasoning Claims must be backed with reasoning. Reasoning should be based in logic. Valid reasoning uses facts, statistics, or personal experience to support their claim. Monday, March 5, 14

Example Becky tells her teacher that she is allergic to pollen, every time she is outside for recess her allergies act up, and therefore the playground must have a high pollen count. This is valid because we see a logical sequence based on true statements. Monday, March 5, 14

Fallacious Reasoning Fallacy is an argument that does not provide the necessary support to back up the given claims. Fallacy is an error in reasoning. Monday, March 5, 14

Most Common Types of Fallacious Reasoning Slippery Slope Hasty Generalization Post hoc ergo propter hoc Genetic Fallacy Circular Argument Either/Or Ad hominem Ad populum Red Herring Monday, March 5, 14

Slippery Slope If A happens, then B, C, ......, X, Y, Z, will happen too. If we ban Hummers because they are bad for the environment, eventually the government will ban all cars, so we should not ban Hummers. Monday, March 5, 14

Hasty Generalization A rushed conclusion before you have all the relevant facts. Even though it’s only the ﬁrst day, I can tell this is going to be a boring course. Monday, March 5, 14

Post hoc ergo propter hoc If A occurred after B, then B must have caused A. I drank bottled water and now I am sick, so the water must have made me sick. Monday, March 5, 14

Genetic Fallacy Conclusion based on an argument that the origins of a person, idea, institute, or theory determine its character, nature, or worth. The Volkswagen Beetle is an evil car because it was originally designed by Hitler’s army. Monday, March 5, 14

Circular Argument Restates the argument rather than actually proving it. George Bush is a good communicator because he speaks effectively. Monday, March 5, 14

Either/Or Conclusion oversimpliﬁes the argument by reducing it to only 2 sides or choices. We can either stop using cars or destroy the earth. Monday, March 5, 14

Ad hominem Attack on the character of a person rather than their opinions or arguments. Green Peace’s strategies aren’t effective because they are all dirty, lazy hippies. Monday, March 5, 14

Ad populum An emotional appeal that speaks to positive (patriotism/ religion/democracy) or negative (terrorism/facism) concepts rather than the real issue. If you were a true American, you would support the rights of people to choose whatever vehicle they want. Monday, March 5, 14

Red Herring A diversionary tactic that avoids the key issues, often by avoiding opposing arguments rather than addressing them. The level of mercury in seafood may be unsafe, but what will ﬁshermen do to support their families. Monday, March 5, 14

Sources http://knowyourmeme.com/memes/your-argument-is- invalid Author’s Reasoning Resource Handout Monday, March 5, 14

## Add a comment

 User name: Comment:

August 20, 2017

August 20, 2017

August 11, 2017

August 20, 2017

August 20, 2017

August 20, 2017

## Related pages

### SticiGui Reasoning and Fallacies - Statistics at UC ...

Reasoning and Fallacies This chapter reviews logical rules that produce valid arguments and common rule violations that lead to fallacies.
Read more

### Valid Arguments and Fallacious Reasoning #3 by Adam Frick ...

Invited audience members will follow you as you navigate and present; People invited to a presentation do not need a Prezi account; This link expires 10 ...
Read more

### Fallacy - Wikipedia, the free encyclopedia

Arguments containing informal fallacies may be formally valid, but still fallacious ... fallacious reasoning ... reasoning therefore the term logical ...
Read more

### NOTES ON LOGICAL FALLACIES, ETC. (Click on what you want)

NOTES ON LOGICAL FALLACIES, ETC. ... Fallacious reasoning is typically an attempt to resolve a complex ... sometimes a fallacious argument can be valid.
Read more

### ERIC - Valid and Fallacious Reasoning: Some Shades of Gray ...

Valid reasoning is a difficult task and vice and virtue are not always clearly distinguishable in human reasoning. Discusses different ways of analyzing ...
Read more

### Fallacious Argument - Cunningham & Cunningham, Inc.

An argument that sometimes fools human reasoning, but is not logically valid. It is crucial to remember that reasoning from definitions and facts to ...
Read more

### Deductive fallacy - Wikipedia, the free encyclopedia

A deductive fallacy is defined as ... and thus encompasses informal fallacies as well as formal fallacies—valid but unsound ... Circular reasoning ...
Read more

### Fallacies - The Writing Center at UNC-Chapel Hill

This handout discusses common logical fallacies that you may encounter ... of fallacious reasoning in ... make the argument valid is ...
Read more

### Logical Fallacies: Arguments, Reasoning, and the Fallacy

... a fallacious argument fails to ... the existence of a fallacy means that the argument is not valid ... Logical Fallacies: Arguments, Reasoning, ...
Read more