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Case file

Marcion of Sinope

Wikipedia's first sentence called it “a 2nd century christian teacher”. Today it says “theologian in early christianity”. The one-line description Wikipedia serves to search engines and AI systems read “Early Christian theologian excommunicated from the proto-orthodox Church”. It now reads “Early Christian theologian (c.85–c.160)”.
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

Marcion of Sinope (ca. 110 - 160 ), was a 2nd century Christian teacher, one of the first to be denounced by catholic Christians as a heretic , who advocated an ascetic Christianity with parallels in gnosticism . He founded "a church which within half a generation expanded throughout the known world, vigorous enough to be in almost every place a serious rival to the catholic church, and with strong enough convictions to retain its expansive power for more than a century, and to survive heathen persecution, Christian controversy, and imperial disapproval for several centuries more" (Evans 1972 p. ix). Some ideas of Marcion's reappeared among the Bogomils and the Cathars of southern France in the 13th century.1

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 17770367.
Today
Wikipedia's first sentence called it “a 2nd century christian teacher”. Today it says “theologian in early christianity”. The one-line description Wikipedia serves to search engines and AI systems read “Early Christian theologian excommunicated from the proto-orthodox Church”. It now reads “Early Christian theologian (c.85–c.160)”. Read the current article and compare.
2005201020152020Oct '232025
martyr000111
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

a 2nd century christian teacher

Now

theologian in early christianity

Sections that no longer exist

Present on October 6, 2023, absent today, with no near-matching heading in the current article and the article shorter overall, so this is not a renamed heading or a topic absorbed into a fuller treatment. 1 section of 400 characters or more gone since October 6 2023, with the article 526 characters shorter.

  • Sources
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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