Ad Hominem (Guilt by Association)
A logical fallacy where a person or argument is discredited based on a perceived negative association with another person or group, rather than on the merits of the argument itself.
THE IDEA
Ad Hominem (Guilt by Association)
Also called the association or bad-company fallacy. A person or argument is dismissed because of an association with a disfavored person or group, without showing why that association undermines the claim.
Example #1: Delores is an advocate for equal pay for equal work. She is an extreme feminist. Therefore, you should not support the equal pay for equal work policy. Explanation: Labeling Delores an extreme feminist does not establish whether equal pay is a sound policy. The policy needs to be evaluated on its merits.
Example #2: Frankie thinks that religion is harmful and should be outlawed. Pol Pot also thought that religion is harmful and should be outlawed. Pol Pot was a very bad man. Therefore, Frankie is a very bad man. Explanation: The fact that Pol Pot and Frankie share one particular view does not mean they are identical in other ways unrelated, specifically, being a very bad man. Pol Pot was not a bad man because he was against religion, he was a bad man for his genocidal actions.
An association may be relevant evidence when a specific connection to the claim is demonstrated. Funding, coordination, or shared actions can warrant scrutiny; mere association does not prove identical views, conduct, or guilt.
When to use it
In a political campaign, a candidate is criticized for having once been endorsed by a controversial figure.
During a debate, a speaker dismisses a scientific study because its funding came from a company with a poor reputation.
In a legal setting, a lawyer argues that a witness is unreliable because they belong to a group known for dishonesty.
FROM THEORY TO EVERYDAY LIFE
In practice
Equal Pay and Feminism
Delores is an advocate for equal pay for equal work. She is an extreme feminist. Therefore, you should not support the equal pay for equal work policy.
Religion and Genocide
Frankie thinks that religion is harmful and should be outlawed. Pol Pot also thought that religion is harmful and should be outlawed. Pol Pot was a very bad man. Therefore, Frankie is a very bad man.
A MOMENT TO REFLECT
Put it to work.
Can you recall a time when you dismissed someone's point because of who they associate with? How might that have been fallacious?
In what ways can guilt by association be a useful heuristic in everyday life, and when does it become a fallacy?
How would you evaluate an argument that uses guilt by association to discredit a policy?
CONTINUE THE CONVERSATION
Source texts
- Logically Fallacious - The Ultimate Collection of Over 300 Logical Fallacies