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An appeal to fear (also called argumentum ad metam or argumentum in terrorem) is a logical fallacy in which a person attempts to create support for her or his idea by increasing fear and prejudice toward a competitor. The appeal to fear is extremely common in marketing and politics.

Contents 1 Logic 2 Fear, uncertainty and doubt 2.1 Image wars 3 As persuasion 4 Examples 5 See also 6 External links 7 References

This fallacy has the following argument form:

Either P or Q

Q is fearsome

Therefore, P is true.

The argument is invalid. The appeal to emotion is used in exploiting existing fears to create support for the speaker's proposal, namely P. Also, often the false dilemma fallacy is involved, suggesting P is the proposed idea's sole alternative.

Main article: Fear, uncertainty and doubt

Fear, uncertainty, and doubt (or FUD) is the appeal to fear in sales or marketing; in which a company disseminates negative (and vague) information on a competitor's product. The term originated to describe misinformation tactics in the computer hardware industry and has since been used more broadly. FUD is "implicit coercion" by "any kind of disinformation used as a competitive weapon."^[1] FUD creates a situation in which buyers are encouraged to purchase by brand, regardless of the relative technical merits. Opponents of certain large computer corporations state that the spreading of fear, uncertainty, and doubt is an unethical marketing technique that these corporations consciously employ.

Although FUD was originally attributed to IBM, the 1990s saw the term become often associated with industry giants Microsoft and Apple Computer. The Halloween documents (leaked internal Microsoft documents whose authenticity was verified by the company) use the term FUD explicitly to describe a potential tactic against Open source software.^[2] More recently, Microsoft has issued statements about the "viral nature" of the GNU General Public License (GPL), which Open Source proponents purport to be FUD.^{[citation needed]}

Fear appeals are often used in marketing and social policy, as a method of persuasion. Fear is an effective attitude changer, especially fears of social exclusion, and getting laid-off from one's job.^[3] Fear appeals are nonmonotonic, meaning that the level of persuasion does not increase in proportion to the amount of fear that is used. A study of public service messages on AIDS found that if the messages were too aggressive or fearful, they were rejected by the subject; a moderate amount of fear is the most effective attitude changer.^[3]
Noam Chomsky, among others, has suggested that the appeal to fear plays a role in social oppression on a large scale.^{[citation needed]} According to this belief, political institutions and the mass media use the appeal to fear to foster conformity and maintain the status quo.

• "Nobody ever got fired for buying IBM"
• "If we don't introduce National ID cards, the terrorists have won."
• "We are taking the fight abroad so we don't have to fight them here."
• "If the defendant is acquitted, there will be riots. Therefore, he is guilty."
• "You don't want Mr Jones to come back, do you?"- example of fear-based propaganda from "Animal Farm" by George Orwell
• "Believe in God or burn in Hell." (this also uses appeal to force)
• "You should stop drinking unless you want to die young like your father."
• "If you don't graduate from high school, you'll always be poor."

• appeal to emotion
• appeal to force
• Embrace, extend and extinguish

• Propaganda critic: Fear appeal

1. ^ Raymond, Eric S. FUD. The Jargon File.
2. ^ Open Source Initiative. "Halloween I: Open Source Software (New?) Development Methodology"
3. ^ ^{a b} Solomon. Zaichkowsky, Polegato. Consumer Behaviour Pearson, Toronto. 2005

Fallacies of Irrelevance v • d • e
Absurdity | Argument from ignorance | Argument from silence | Bandwagon fallacy Bulverism | Irrelevant conclusion | Middle ground | Missing argument Proof by assertion | Straw man | Style over substance | Two wrongs make a right
Appeal to consequences:
	Appeal to force | Wishful thinking
Appeal to emotion:
	Fear | Flattery | Nature | Pity | Repugnance | Ridicule | Spite
Genetic fallacy:
	Personal attack (Appeal to motive | Guilt by association | Poisoning the well | You too) Appeal to authority (Novelty | Poverty | Tradition | Wealth) | Chronological snobbery | Etymology
Other types of fallacy