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Case file

Judea Pearl

Judea Pearl is the computer scientist whose son, journalist Daniel Pearl, was kidnapped and murdered in Pakistan in 2002. The 2010 opening said he 'is the father of journalist Daniel Pearl, who was kidnapped and murdered by militants in Pakistan in 2002.' Today's opening omits his son's murder entirely, describing him only through his computer science career. A reader arriving today does not learn that Judea Pearl is the father of a journalist murdered by militants in Pakistan.
Read line by line and written up by hand.
Machine-checked against the full current article on 2026-08-01. “militant” appeared 1 times in this article's opening at its peak. Today it appears nowhere in the article, references included.
We saved snapshots of this article over twenty years; you are reading the 2010 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 2010

Judea Pearl (Born 1936) is a computer scientist and philosopher , best known for developing the probabilistic approach to artificial intelligence , in particular through Bayesian networks (see the article on belief propagation ), for the formalization of causal reasoning (see the article on causality ) and the formalization of Structural equation modeling .1 Judea Pearl is the father of journalist Daniel Pearl , who was kidnapped and murdered by militants in Pakistan in 2002.2

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 368887712.
Today
“militant” appeared 1 times in this article's opening at its peak. Today it appears nowhere in the article, references included. Read the current article and compare.
2005201020152020Oct '232025
militant011000
terror000111
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 between 2005 and 2025.

Then

computer science professor at ucla

Now

israeli-american computer scientist and philosopher

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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