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Av Beit Din

Wikipedia's first sentence called it “chief of the sanhedrin when it sat as a criminal court”. Today it says “second-highest-ranking member of the sanhedrin during the second temple period and served as an assistant to th”.
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The opening as it read in October 6, 2023

Second-highest-ranking member of the Sanhedrin during the Second Temple period The av beit din ( ʾabh bêth dîn , "chief of the court" or "chief justice" ), also spelled av beis din or abh beth din and abbreviated ABD ( אב״ד ‎), was the second-highest-ranking member of the Sanhedrin during the Second Temple period , and served as an assistant to the Nasi (Prince).1 The Av Beit Din was known as the "Master of the Court;" he was considered the most learned and important of these seventy members. Menahem the Essene served as Av Beth Din in the 1st century BCE, before abdicating to "serve the King" in 20 BCE. The House of Shammai attained complete ascendency over the Sanhedrin from 9CE until Gamaliel became Nasi in 30CE.2 Apparently the post of Av Beit Din was eventually filled, since the Babylonian Talmud states that Joshua ben Hananiah was Av Beit Din and Nathan the Babylonian was Av Beit Din. The Jerusalem Talmud tells the story of how Gamaliel II was deposed and Eleazar ben Azariah replaced him as Nasi. After Gamaliel was reinstated, Eleazar ben Azariah was made Av Beit Din. The parallel story in the Babylonian Talmud has Eleazar ben Azariah remaining as a co-Nasi with Gamaliel. One or more of the preceding sentences incorporates text from a publication now in the public domain : Singer, Isidore ; et al., eds.

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 1144005655.
Today
Wikipedia's first sentence called it “chief of the sanhedrin when it sat as a criminal court”. Today it says “second-highest-ranking member of the sanhedrin during the second temple period and served as an assistant to th”. Read the current article and compare.
201020152020Oct '232025
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What Wikipedia says this is

Every article opens by defining its subject. This one was redefined since 2010, and today's defining sentence is their current revision.

Then

chief of the sanhedrin when it sat as a criminal court

Now

second-highest-ranking member of the sanhedrin during the second temple period and served as an assistant to th

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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