Appeal to tradition

Core claim: A practice, belief, or rule is defended (or attacked) primarily because it has been done or believed for a long time – treating duration or custom as evidence of correctness.

• The central justification for a position is “this is how it has always been done” or “it's the traditional way”, without independent argumentation for why the practice is actually good, safe, or correct.
• A proposed change is rejected solely because it deviates from established custom, even though no substantive reason against the change is given.
• The age of a belief is presented as evidence for its truth (e.g., “this recipe has been used for centuries, so it must work”).
• Tradition is invoked to override contrary evidence or expert consensus in the relevant field.

• Not every reference to tradition is fallacious. Citing historical practice as one input among several (e.g., “this method has a long track record of safety”) is legitimate; the fallacy arises when it becomes the sole or dominant justification.
• The inverse form – rejecting something solely because it is new (“novelty bias” / argumentum ad novitatem) – is structurally identical and should be flagged with the same pattern.

• A tradition is cited as a heuristic starting point that is then evaluated on its merits (e.g., “this technique has been refined over generations; let's examine whether it still holds up under current evidence”).
• The argument explicitly weighs tradition against other factors and acknowledges uncertainty.
• Cultural or religious practices are discussed descriptively without being used as proof of a factual claim.

• Appeal to authority (MD) – relies on the status of a person/institution. Ask: Is the weight carried by a named source's expertise (→ appeal to authority), or by the age/custom itself as an impersonal force (→ appeal to tradition)?
• False authority (MD) – cites someone unqualified. Ask: Is there a specific (incompetent) person being cited (→ false authority), or is “tradition” itself the unnamed authority (→ appeal to tradition)?
• Bandwagon fallacy (MD) – relies on how many people do it. Ask: Is the argument about duration (“we've always done this”) (→ tradition), or about current popularity/number of adherents (“everyone does this now”) (→ bandwagon)?
• Naturalistic fallacy (MD) – infers “ought” from “is”. Ask: Is the leap from what is customary to what is right/good (→ naturalistic), or specifically using longevity as proof of correctness (→ tradition)?

Input: “We've always taught this subject in this order for over a hundred years, so there's no reason to change the curriculum.” Output: The duration of a teaching sequence is not evidence that it is pedagogically optimal. Evaluate the proposed change on its own merits (learning outcomes, cognitive load, etc.) rather than defaulting to “it's always been this way”.

Input: “This herbal remedy has been used in folk medicine for centuries – that proves it works.” Output: Long use does not establish efficacy; many traditional remedies have no active effect beyond placebo. The claim needs controlled evidence, not a longevity argument.

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