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Denying the Antecedent

 

Disciplines Argument > Fallacies > Denying the Antecedent

Description | Discussion | Example | See also

 

Description

If A is true then B is true. A is not true, therefore B is not true.

To disprove something, show how it can be caused by something else. Then show that the cause does not happen (then assume that this proves the antecedent is also false).

Example

If you give a man a gun, he may kill someone. If he has no gun, then he will not kill anyone.

If you work hard, you will get a good job. If you do not work hard you will not get a good job.

I am in London, England. I am not in London, therefore I am not in England.

Discussion

In an 'If A then B' statement, A is the antecedent and B is the consequent.

When you know that 'If A is true then B is true', this statement is only valid for truth of A and B. If A is false, then it does not necessarily follow that B is also false. A place where this is true is in Boolean logic, where A and B are binary variables and can only be true or false. In life, there are often situations where A and B can have many other states.

Classification

Non sequitur, syllogistic

See also

Affirming the Consequent

 

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Site Menu

| Home | Top | Quick Links | Settings |

Main sections: | Disciplines | Techniques | Principles | Explanations | Theories |

Other sections: | Blog! | Quotes | Guest articles | Analysis | Books | Help |

More pages: | Contact | Caveat | About | Students | Webmasters | Awards | Guestbook | Feedback | Sitemap | Changes |

Settings: | Computer layout | Mobile layout | Small font | Medium font | Large font | Translate |

 

 

Please help and share:

 

Quick links

Disciplines

* Argument
* Brand management
* Change Management
* Coaching
* Communication
* Counseling
* Game Design
* Human Resources
* Job-finding
* Leadership
* Marketing
* Politics
* Propaganda
* Rhetoric
* Negotiation
* Psychoanalysis
* Sales
* Sociology
* Storytelling
* Teaching
* Warfare
* Workplace design

Techniques

* Assertiveness
* Body language
* Change techniques
* Closing techniques
* Conversation
* Confidence tricks
* Conversion
* Creative techniques
* General techniques
* Happiness
* Hypnotism
* Interrogation
* Language
* Listening
* Negotiation tactics
* Objection handling
* Propaganda
* Problem-solving
* Public speaking
* Questioning
* Using repetition
* Resisting persuasion
* Self-development
* Sequential requests
* Storytelling
* Stress Management
* Tipping
* Using humor
* Willpower

Principles

+ Principles

Explanations

* Behaviors
* Beliefs
* Brain stuff
* Conditioning
* Coping Mechanisms
* Critical Theory
* Culture
* Decisions
* Emotions
* Evolution
* Gender
* Games
* Groups
* Habit
* Identity
* Learning
* Meaning
* Memory
* Motivation
* Models
* Needs
* Personality
* Power
* Preferences
* Research
* Relationships
* SIFT Model
* Social Research
* Stress
* Trust
* Values

Theories

* Alphabetic list
* Theory types

And

About
Guest Articles
Blog!
Books
Changes
Contact
Guestbook
Quotes
Students
Webmasters

 

| Home | Top | Menu | Quick Links |

© Changing Works 2002-
Massive Content — Maximum Speed