When selecting from a certificate of eligibles, an appointing officer must, with sole reference to merit and fitness, make a selection for the first vacancy from the highest three eligibles available for appointment on the certificate.
Structure of humor where two serious items set a pattern then the third unexpectedly switches the pattern which provokes laughter, or three jokes on one topic in a bit.
(See Learning Standard 16.8)The number three (3) recurs especially in folk literature and fairy tales. For example, three characters, three tasks, repetition of an event three times.
The rule instructing that works giving equal treatment to three or more subjects that are all subdivisions of a broader subject are classified in the first higher number that includes all of them.
The Rule of Three (also threefold law or law of return) is a common tenet in Wicca. It states that both the good and the evil that one creates in the world will be returned threefold (in joy or suffering). http://199.236.86.124/ethics/3fl-1.shtml John J. Coughlin states that, " . . . there is a literal reward or punishment tied to one's actions, particularly when it comes to working magic," and that "there are many Wiccans, experienced and new alike, who view the Law of Return as an over-elaboration on the Wiccan Rede."
In mathematics, the rule of three is the method of finding the fourth term of a mathematical proportion when three terms are known. It is based on the principle that the product of the first and fourth terms (called the extremes) is equal to the product of the second and third terms (called the means).
The rule of three is a principle in English writing that suggests that things that come in threes are inherently funnier, more satisfying, or more effective than other numbers of things. From slogans ("Go, fight, win!") to films (The Godfather trilogy), many things are structured in threes. There were three musketeers, three little pigs, three billy goats Gruff, Goldilocks and the three bears, and Three Stooges.
The rule of three (also known as the Law of The Big Three or The Big Three) is a rule of thumb in C++ that claims that if a class or struct has one of the following it should probably have all three.