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Case file

Mihna

Wikipedia's first sentence called it “significant both as the end of the abbasid caliph's pretension to decide matters of religious orthodoxy”. Today it says “period of religious persecution instituted by the abbasid caliph al-ma'mun in 833 in which sunni scholars were”.
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 2025 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 2025

Period of religious persecution instituted by the 'Abbasid Caliph al-Ma'mun Map of the Mihna and events associated with it The Mihna ( Arabic : محنة خلق القرآن , romanized : miḥna khalq al-qurʾān , lit. ' ordeal of Quranic createdness ' ) was a period of religious persecution instituted by the Abbasid caliph al-Ma'mun in 833 in which Sunni scholars were punished, imprisoned, or even killed unless they conformed to Mu'tazilite doctrine. The policy lasted for eighteen years (833–851) as it continued through the reigns of al-Ma'mun's immediate successors, al-Mu'tasim and al-Wathiq , and four years of al-Mutawakkil who reversed it in 851. Religion and Politics Under the Early ?Abbasids: The Emergence of the Proto-Sunni Elite .

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 1283609361.
Today
Wikipedia's first sentence called it “significant both as the end of the abbasid caliph's pretension to decide matters of religious orthodoxy”. Today it says “period of religious persecution instituted by the abbasid caliph al-ma'mun in 833 in which sunni scholars were”. Read the current article and compare.
201020152020Oct '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 October 7, and today's defining sentence is their current revision.

Then

significant both as the end of the abbasid caliph's pretension to decide matters of religious orthodoxy

Now

period of religious persecution instituted by the abbasid caliph al-ma'mun in 833 in which sunni scholars were

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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