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The article says, "The tune to which "Auld Lang Syne" is commonly sung is a pentatonic Scots folk melody." While the melody can be played as entirely pentonic, it often isn't. Commonly, the third note (first syllable of "acquaintance") is lowered half a step to the leading tone. (A minor point, perhaps.) — Preceding unsigned comment added by Thinkatron (talk • contribs) 21:08, 23 October 2017 (UTC)