Argumentum ad populum
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An argumentum ad populum (Latin: "appeal to the people"), in logic, is a fallacious argument that concludes a proposition to be true because many or all people believe it; it alleges that "If many believe so, it is so." In ethics this argument is stated, "if many find it acceptable, it is acceptable."
This type of argument is known by several names[1], including appeal to belief, appeal to the majority, appeal to the people, argument by consensus, authority of the many, bandwagon fallacy, and tyranny of the majority, and in Latin by the names argumentum ad populum ("appeal to the people"), argumentum ad numerum ("appeal to the number"), and consensus gentium ("agreement of the clans"). It is also the basis of a number of social phenomena, including communal reinforcement and the bandwagon effect, and of the Chinese proverb "three men make a tiger".
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[edit] Examples
This fallacy is sometimes committed while trying to convince a person that a widely popular theory is true.
- Since 88% of the people polled believed in UFOs, they must exist.
- Since citizens have to pay taxes and are ruled by governments, the state must be a judicial reasoned and rightful institution.
- Since most of the world believes in God, he must exist.
It is sometimes committed when trying to convince a person that widely unpopular theories are false.
- It's silly for you to claim that Hitler would not have attacked the United States if they hadn't entered World War II. Everyone knows that he planned to conquer the world.
The fallacy is commonly found in arguments over ethics:
- Most Americans hold that the Vietnam War was morally wrong. Therefore, the Vietnam War was morally wrong.
The fallacy is also commonly found in marketing:
- Brand X vacuum cleaners are the leading brand in America. You should buy Brand X vacuum cleaners.
Other examples:
- Fifty million Elvis fans can't be wrong.
- Christianity is believed in by the greatest amount of people in the world, so it must be true.
- "Every society but ours believed in magic; why should we think otherwise?" "Every society but ours thought the sun revolved about the Earth, rather than the other way round. Would you decide the matter by majority vote?" - Isaac Asimov.
- In a court of law, the jury vote by majority, therefore they will always make the correct decision
[edit] Explanation
The argumentum ad populum is a red herring and genetic fallacy. It is logically fallacious because the mere fact that a belief is widely held is not necessarily a guarantee that the belief is correct; if the belief of any individual can be wrong, then the belief held by multiple persons can also be wrong.
This fallacy is similar in structure to certain other fallacies that involve a confusion between the justification of a belief and its widespread acceptance by a given group of people. When an argument uses the appeal to the beliefs of a group of supposed experts, it takes on the form of an appeal to authority; if the appeal is to the beliefs of a group of respected elders or the members of one's community over a long period of time, then it takes on the form of an appeal to tradition.
One who commits this fallacy may assume that individuals commonly analyze and edit their beliefs and behaviors. This is often not the case (see conformity).
[edit] Evidence
- One could claim that smoking is a healthy pastime, since millions of people do it. However, knowing the dangers of smoking, we instead say that smoking is not a healthy pastime despite the fact that millions do it.
- One could claim that 13 is an "unlucky" number, since many people (triskaidekaphobes) believe it to be. However, the association of any number with the concept of luck is a superstition.
- One could claim Brad Pitt is the best-looking man in the world, because he is regularly voted such, although the sample he is part of (celebrities) is insufficient.
- Environmentalists often claim that global warming must be happening, because most scientists believe it is happening. However, science works by evidence, not popular vote. It is more appropriate to point to the balance of evidence itself being strongly in favour of global warming, than to point to the number of scientists for or against the hypothesis.
[edit] Exceptions
Appeal to belief is only valid when the question is whether the belief exists. Appeal to popularity is therefore only valid when the questions are whether the belief is widespread and to what degree.
[edit] Democracy
The "correctness" of electoral processes lies in the prior acceptance by the electorate that the outcome of an election shall be enacted no matter what it is.
- "Most of the voting members at the last Rotary Club meeting thought that the Club should hold a fund-raiser in October. Therefore, the Club should hold a fund-raiser in October."
Democracy by plural voting is based on appeal to popularity. As a means of determining the truth of beliefs, it is fallacious. Democracy does not obviate this; it merely makes the fallacy irrelevant by defining law as subjective rather than objective*. Nonetheless, acceptance of policies and candidates have been shown to be well-correlated with their effectiveness (cf. Approval voting). As a system of political decisionmaking, electoral systems compare favorably against fiat systems such as feudalism and pseudo-democracies such as one-party rule. (Though the astute will note that this is a circular argument: Democracy is good because people living in a democracy say so.)
Argumentum ad populum explains how some democracies have fallen victim to this principle. (See Propaganda and Nazi Germany.)
[edit] Social convention
Matters of social convention, such as etiquette or polite manners, depend upon the wide acceptance of the convention. As such, argumentum ad populum is not fallacious when referring to the popular belief about what is polite or proper:
- "Most people in Russia think that it is polite for men to kiss each other in greeting. Therefore, it is polite for men to kiss each other in greeting in Russia."
Social conventions can change, however, sometimes very quickly. Thus, the fact that everyone in Russia this year thinks that it is polite to kiss can't be used as evidence that everyone always believed that, or that they should always believe it.
The philosophical question of moral relativism asks whether such arguments apply to statements of morals.
[edit] Safety
Whether to follow a tenet decided by popularity rather than logical design may be a matter of safety or convenience:
- "Nearly all Americans think that you should drive on the right side of the road. Therefore, you should drive on the right side of the road in the United States."
In this case, the choice of which side to drive on is basically arbitrary. However, to avoid head-on collisions, everyone on the road must agree on it. In many cases, what is safe to do depends on what others expect one will do, and thus on the "popularity" of that choice.
[edit] References
- ^ Austin Cline. Argumentum ad Populum
