Appeal to tradition treats the age or longevity of a practice as proof of its correctness — “we’ve always done it this way,” “it’s tradition,” “time-honored.” It is a rhetorical-authority move that rides on status-quo bias: the mind’s tendency to prefer the established simply because it is established. The fallacy is that persistence and validity are different things; a practice can survive for reasons — habit, inertia, sunk cost, who benefits — that have nothing to do with whether it still works.
The tactic is effective partly because it wraps itself in legitimate values. Tested, time-earned practice often is wise, and respecting institutional memory is reasonable. The manipulation begins when age is offered as the sole justification and when asking “why do we do this?” gets reframed as disrespect or disloyalty — a move that quietly converts a fair question into a social cost, shielding the practice from the scrutiny that would reveal whether it still earns its place.
Direct harm from any single instance is usually low, so the defense is proportionate: ask for present-day evidence rather than pedigree. What problem does the practice solve now? Does that problem still exist? Would you adopt it today if it weren’t already in place? Longevity can flag something worth preserving, but it is a prompt to examine, not a substitute for the examination.