As of August 6, 2026, no new social media or news activity has been recorded for Jon Barwise. Kenneth Jon Barwise (; June 29, 1942 – March 5, 2000) was an American mathematician, philosopher and logician who proposed some fundamental revisions to the way that logic is understood and used. StarFeed checks for new updates every few minutes. Use the day-by-day view above to see activity from other dates.