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by canucker2016 43 days ago
It seems to be called the Rule of 3. see https://en.wikipedia.org/wiki/Rule_of_three_(writing)

Like Caesar's supposed "Veni Vidi Vici" saying, people seem to prefer and remember items when grouped in three.

I recall a public speaking film shown to my management science class starring John Cleese mentioning this rule of 3.