Ретрорикалық схемалар: Изоколон, триколон және тетраколон

Figure of speech
the Unicode character tricolon (ie. ⁝)
Isocolon is a rhetorical scheme in which parallel elements possess the same number of words or syllables. As in any form of parallelism, the pairs or series must enumerate like things to achieve symmetry. The scheme is called bicolon, tricolon, or tetracolon depending on whether they are two, three, or four parallel elements.

An example of bicolon is the advertising slogan "buy one, get one free" (you pay for one item but you get another free). This can be considered a bicolon. A tricolon that comprises parts in increasing size, magnitude or intensity is called a tricolon crescens, or an ascending tricolon. Tricolon can sometimes be a hendiatris. Similarly, tricolon that comprises parts that decrease in size, magnitude, intensity, or word length is called a tricolon diminuens, or a descending tricolon. Abraham Lincoln used tricolon in many of his speeches. His Gettysburg Address has the following phrase: "We cannot dedicate – we cannot consecrate – we cannot hallow " Lincoln wrote in his second inaugural address, "with malice toward none, with charity toward all, with firmness in the right ". Winston Churchill used the tricolon frequently, as in his June 1941 speech regarding the German invasion of the Soviet Union, when he stated "It is a war in which the whole British Empire and Commonwealth of Nations is engaged without distinction of race, creed or party." Repeating the same thing multiple times is a special case of an isocolon, as a way of saying that only one thing is important, and it is very important. In about 1500, when Louis XII asked Giangiacopo Trivulzio what was necessary to win the war against Ludovico Sforza, Trivulzio answered: "Three things, Sire, Money, money, money!" In the 20th century, the cliché "Location, location, location" was said to enumerate the three most important attributes of real property. This phrase appears in print in Chicago as early as 1926, but is nonetheless frequently credited, incorrectly, to the British real estate magnate Lord Harold Samuel. British Prime Minister Tony Blair set out his priorities for office in 1997 with "Education, education, education".

Tetracola are sometimes called "quatrains" (cf. the usual meaning of quatrain).