The practice outlived everyone who could have explained why it started. Outliving the explanation got mistaken for winning the argument.
Also known as Argumentum ad antiquitatem
An argument that a practice, belief, or policy is correct because it's old, because it's how things have always been done, or because it's simply survived a long time. Longevity gets treated as if it were evidence of merit, when a practice can persist for reasons that have nothing to do with whether it still works, or ever did.
Truth-adjacency
Truth-adjacent: the pattern's significance depends on whether the claim is true
Where it shows up
Public discourse
How it works
The phrases and tells that mark this pattern in the wild:
we've always done it this waythis is how it's been for generationsif it were wrong, it wouldn't have lastedour founders knew what they were doingchanging it now would mean abandoning who we areRemove the practice’s age from its own defense and see what’s left standing. If nothing is, no mechanism, no current justification, no evidence the practice still does what it was meant to do, the age was the entire argument, and age alone was never actually evidence of anything except survival.
The pattern rests on age standing in for justification, on nothing being offered except how long the practice has lasted. A method that’s been refined and tested over a long period, where the reasoning has actually been revisited and still holds, is a track record making its case on the merits, not a tradition hiding behind its own calendar.
One of these two real scenarios is Appeal to tradition. The other is a different pattern entirely. Which one is which?
The tell
A practice isn't wrong just because it's old, and pointing out that something has worked reliably for a long time is genuine evidence, not this fallacy, when the reasons for its persistence have actually been examined. The pattern is specifically substituting age for justification: the only defense offered is duration itself, with the original reasoning either unexamined or no longer applicable. A tradition that can also explain, in current terms, why it still serves its purpose isn't resting on this fallacy. A tradition defended by its calendar alone is.
How this pattern gets misused
Someone dismisses any long-standing practice as automatically suspect purely for being old, treating age itself as disqualifying rather than asking whether the practice still serves its original purpose.
What it looks like when you're wrong about it
A practice isn't wrong just because it's old, and pointing out that something has worked reliably for a long time is genuine evidence, not this fallacy, when the reasons for its persistence have actually been examined. The pattern is specifically substituting age for justification: the only defense offered is duration itself, with the original reasoning either unexamined or no longer applicable. A tradition that can also explain, in current terms, why it still serves its purpose isn't resting on this fallacy. A tradition defended by its calendar alone is.
Not sure? Describe the situation to someone outside it. If they do not see the pattern, pause before you name it.
Misjudgments compound rather than act alone. This pattern is often deployed alongside:
The name is designed to spread. The hook is designed to stick. If you recognized something, share the name.
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