Example start pattern:

... 1 ... 2 ... 3 ... 4 ...

Then ending pattern:

... 4 ... 3 ... 2 ... 1 ...

The English word "chiasmus" is from the Latin word "chiasmus" ≈ "chiasmus" and is from the ancient Greek word "χιασμός" ≈ "crossing" which is from "χιάζω" ≈ "mark with a chi, shape like a chi".
In general, a "chiasm" consists of an intersection or crossing of two series that can be interpreted as the form of the letter "X". By contrast, a "chiasmus" is a literary device whereby there is an inversion of the elements of phrases that do not use the same words. A "antimetabole" is similar but may repeat the same word or words.

There is a deceptive relationship between a chiasmus and the following.

• Converse error whereby "if A then B" is not the same as "if B then A". If the conditional goes both ways, then it is an "if and only if" logic statement. The repetition would appear as a "chiasm".
• Top-down backward-chaining logic and bottom-up forward-chaining logic. One after the other would appear as a "chiasm".

A palindrome can be considered a chiasmus at the letter level.

The English word "palindrome" is a word whose letters are the same forward and backwards. Sometimes phrases are used where the blanks and other punctuation are ignored.
The English word "palindrome" comes from the ancient Greek word "παλίνδρομος" ≈ "running back again" and comes from two ancient Greek words.

• "πάλιν" ≈ "again" and "δρόμος" ≈ "race course".

The word "palindrome" was coined in 1638 by English poet and writer Henry Peacham. The idea appeared much earlier in history. Palindromes are found in the DNA (Deoxyribonucleic Acid) code.

• The English word "recursion" means, literally "running again".
• "Cursive" text is text that "runs" or "flows".



More: Running back again with the palindromes