Argumentum ad baculum
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Argumentum ad baculum (Latin for "argument to the cudgel" or "appeal to the stick") is the fallacy committed when one appeals to force or the threat of force to bring about the acceptance of a conclusion. One participates in argumentum ad baculum when one points out the negative consequences of holding the contrary position (ex. believe what I say, or I will hit you). It is a specific case of the negative form of an argument to the consequences.
The fallacious ad baculum
A fallacious logical argument based on argumentum ad baculum generally proceeds as follows:
- If x accepts P as true, then Q.
- x acts to prevent Q and succeeds, so Q is not true.
- Therefore, P is not true.
This form of argument is an informal fallacy, because the attack on Q may not necessarily reveal anything about the truth value of the premise P. This fallacy has been identified since the Middle Ages by many philosophers. This is a special case of argumentum ad consequentiam, or "appeal to consequences".
- General: "If we accept capitulation, the enemy will take the chance to slaughter us all."
- Colonel: "So far they have treated captives adequately."
- General: "This time they won't. And you better believe me if you don't want to find yourself rotting in a mass grave."
The colonel (x) wants to avoid death (Q), therefore he abandons capitulation (P), although the undesirability of death does not prove that death follows from capitulation.
The non-fallacious ad baculum
This argument is of the form:
- If x accepts P, then Q.
- x does not want Q and will act to prevent it.
- Therefore, x will reject P.
The fallacy in the argument lies in assuming that the truth value of "x accepts P" is related to the truth value of P itself. Whether x does accept P, and whether P is true can not be inferred from the available statements. However, the argument can be changed into a valid modus tollens by changing the conclusion.
- If Peter does not deny knowing Jesus, he will be arrested by the Romans.
- Peter does not want to be arrested by Romans.
- Therefore, Peter denies knowing Jesus.
Note that this argument does not assert or come to any conclusion on whether Peter knows Jesus (cf. the fallacious conclusion "Therefore, Peter does not know Jesus").
- Argument from authority
- Conformity (psychology)
- Formal fallacy
- In terrorem
- Legal threat
- List of fallacies
- might makes right
- Management by perkele
- Pascal's Wager
- Proof by intimidation
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