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Chiasmus

Wikipedia's first sentence called it “figure of speech based on inverted parallelism”. Today it says “reversal of grammatical structures in successive phrases or clauses without repetition of words”.
Measured, not asserted. Every count, date and revision on this page was taken from Wikipedia's own history and checked against the live article. The words quoted are theirs.
Machine-checked against the full current article on 2026-08-03.
We saved snapshots of this article over twenty years; you are reading the 2005 one. Red dashes: removed from Wikipedia since. Pale dots: rewritten; the numbered note shows what it says now. 1 tap a number or a side note to jump between them
The opening as it read in 2005

Chiasmus is a figure of speech based on inverted parallelism . It is a rhetorical figure in which two clauses are related to each another through a reversal of terms in order to make a larger point. In Latin in particular, it was used to articulate balance or order within the text in which it was included.1 Today, chiasmus is applied fairly broadly to any "criss-cross" structure, although in classical rhetoric, it would have been distinguished from other similar devices, especially antimetabole . In its classical application, chiasmus would have been used for structures that do not repeat the same words and phrases.2

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 17974279.
Today
Wikipedia's first sentence called it “figure of speech based on inverted parallelism”. Today it says “reversal of grammatical structures in successive phrases or clauses without repetition of words”. Read the current article and compare.
2005201020152020Oct '232025
Counts in the opening at each snapshot. Green: the word gained ground. Red: it was cut. Grey: no change.

What Wikipedia says this is

Every article opens by defining its subject. This one was redefined since 2005, and today's defining sentence is their current revision.

Then

figure of speech based on inverted parallelism

Now

reversal of grammatical structures in successive phrases or clauses without repetition of words

Struck red text is no longer in the article; dotted amber text was rewritten. Every revision id links to Wikipedia's copy; the text shown is our own saved copy. Data: /data. Wikipedia text is CC BY-SA; quoted for the record; not affiliated with Wikipedia.

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