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Traced to a Song commentary on poetry in 《苕溪渔隐丛话》, where ancient regulated verse was said to 'seem 无伦次 but meaning still strings together like beads' — originally a compliment about hidden coherence, later flipped to mean plainly disordered.
memory
伦次 means 'sequence / proper order'. Literally 'words have no sequence' — picture someone whose sentences tumble out of order.
