This is a Lexicon entry: the mechanism, when it shows up, and the countermeasure. The full correction, with real-world cases and the audit prompt, hasn't been written yet.
Definition
A cognitive bias where people judge statements as more truthful or believable if they are aesthetically pleasing - having a rhyme, rhythm or elegant structure - regardless of their actual accuracy. "An apple a day keeps the doctor away" feels truer than its unrhymed equivalent.
When it shows up
Proverbs, slogans, political messaging, religious verses, advertising jingles. Any important claim packaged in rhyme, rhythm or pleasing structure. 'An apple a day keeps the doctor away.' 'If it doesn't fit, you must acquit.'
Failure mode
Aesthetic smoothness is mistaken for epistemic quality. Statements that rhyme or scan well are rated truer than their literal equivalents. The rhyme does the persuading and the reasoning-brain never activates.
Countermeasure
Restate rhyming or rhythmic claims in flat prose before judging them. If the claim only feels true when it rhymes, the aesthetic was carrying the conviction.
Related traps
Also connected in the mapThe Fluency Effect
Credit & first seen
DiscoveredMcGlone, M.S.&Tofighbakhsh, J. (2000).'Birds of a feather flock conjointly (?): Rhyme as reason in aphorisms.'Psychological Science 11(5), 424-428 source ↗
Read next
Entry #31 of 631 in The Lexicon · see the full Lexicon