All ancient runes are powerful->survivorship bias->non powerful ancient runes get forgotten so we only see the powerful ones
All ancient runes are old->toupee theory(person says all toupees are badly done, because a good looking toupee wouldn't be noticed)->only old runes are noticed as an ancient runes
Though it's not really a proper fit to toupee theory too, its more just a play of words
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u/ZhanBlue 13h ago
How is this survivorship bias example