Case file
Simcha Blass
Wikipedia's first sentence called it “israeli water engineer”. Today it says “polish - israeli engineer and inventor who developed the modern drip irrigation system with his son yeshayahu”.
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 2020 one. Red dashes: removed from Wikipedia since.
Pale dots: rewritten; the numbered note shows what it says now.
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The opening as it read in 2020
Mei Meriva u-Ma'as (Water in Strife and Action) (in Hebrew). Eliyahu's Branches: The Descendants of the Vilna Gaon .
This is Wikipedia's own text, saved in our repository. Their copy of it is revision 961823509.
Today
Wikipedia's first sentence called it “israeli water engineer”. Today it says “polish - israeli engineer and inventor who developed the modern drip irrigation system with his son yeshayahu”. Read the current article and compare.
| 2010 | 2015 | 2020 | Oct '23 | 2025 |
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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
israeli water engineer
Now
polish - israeli engineer and inventor who developed the modern drip irrigation system with his son yeshayahu
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.