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{{short description|American mathematician, philosopher and logician}}Kenneth Jon Barwise ({{IPAc-en|ˈ|b|É‘r|w|aɪ|z}}; June 29, 1942 â€“ March 5, 2000)WEB, Walsh, Eileen, Noted logician K. Jon Barwise dies, Stanford News Service, 8 March 2000,news.stanford.edu/pr/00/000308barwise.html, 29 March 2015, 17 June 2016,news.stanford.edu/pr/00/000308barwise.html," title="web.archive.org/web/20160617043655news.stanford.edu/pr/00/000308barwise.html,">web.archive.org/web/20160617043655news.stanford.edu/pr/00/000308barwise.html, dead, was an American mathematician, philosopher and logician who proposed some fundamental revisions to the way that logic is understood and used.

Education and career

He was born in Independence, Missouri, to Kenneth T. and Evelyn Barwise.A pupil of Solomon Feferman at Stanford University, Barwise started his research in infinitary logic. After positions as assistant professor at Yale University and the University of Wisconsin, during which time his interests turned to natural language, he returned to Stanford in 1983 to direct the Center for the Study of Language and Information (CSLI). He began teaching at Indiana University in 1990. He was elected a Fellow of the American Academy of Arts and Sciences in 1999.WEB, Book of Members, 1780-2010: Chapter B,www.amacad.org/publications/BookofMembers/ChapterB.pdf, American Academy of Arts and Sciences, May 20, 2011, In his last year, Barwise was invited to give the 2000 Gödel Lecture; he died prior to the lecture.JOURNAL, 2000, 2000 Annual Meeting of the Association for Symbolic Logic,www.jstor.org/stable/421070, The Bulletin of Symbolic Logic, 6, 3, 361–396, 10.2307/421070, 421070, 1079-8986,

Philosophical and logical work

Barwise contended that, by being explicit about the context in which a proposition is made, the situation, many problems in the application of logic can be eliminated. He sought ... to understand meaning and inference within a general theory of information, one that takes us outside the realm of sentences and relations between sentences of any language, natural or formal. In particular, he claimed that such an approach resolved the liar paradox. He made use of Peter Aczel’s non-well-founded set theory in understanding “vicious circles” of reasoning.Barwise, along with his former colleague at Stanford John Etchemendy, was the author of the popular logic textbook Language, Proof and Logic. Unlike the Handbook of Mathematical Logic, which was a survey of the state of the art of mathematical logic circa 1975, and of which he was the editor, this work targeted elementary logic. The text is notable for including computer-aided homework problems, some of which provide visual representations of logical problems. During his time at Stanford, he was also the first Director of the Symbolic Systems Program, an interdepartmental degree program focusing on the relationships between cognition, language, logic, and computation. The K. Jon Barwise Award for Distinguished Contributions to the Symbolic Systems Program has been given periodically since 2001.WEB,symsys.stanford.edu/viewing/htmldocument/13686, K. Jon Barwise Award, Symbolic Systerms Program, Stanford University, 2015-03-29,web.archive.org/web/20170615233222/https://symsys.stanford.edu/viewing/htmldocument/13686, 2017-06-15, dead,

Selected publications

• Barwise, K. J. (1975) (iarchive:admissiblesetsst00barw_0|Admissible Sets and Structures. An Approach to Definability Theory) {{ISBN|0-387-07451-1}}
• Barwise, K. J. & Perry, John (1983) (iarchive:situationsattitu00barw|Situations and Attitudes.) Cambridge: MIT Press. {{ISBN|1-57586-193-3}}JOURNAL, Butterfield, Jerry, Review of Situations and Attitudes by Jon Barwise and John Perry, The Philosophical Quarterly, April 1986, 36, 143, 292–296, 10.2307/2219775, 2219775,
• Barwise, K. J. & Etchemendy, J. (1987) (iarchive:liaressayontruth0000barw|The Liar: An Essay in Truth and Circularity) {{ISBN|0-19-505944-1}}JOURNAL, Moss, Lawrence S., Review of The Liar: An essay in truth and circularity by Jon Barwise and John Etchemendy, Bull. Amer. Math. Soc. (N.S.), 1989, 20, 2, 216–225,www.ams.org/journals/bull/1989-20-02/S0273-0979-1989-15770-4/S0273-0979-1989-15770-4.pdf, 10.1090/S0273-0979-1989-15770-4, free,
• Barwise, K. J. (1988) (iarchive:situationinlogic0000barw|The Situation in Logic) {{ISBN|0-937073-32-6}}
• Barwise, K. J. & Moss, L. (1996) (iarchive:viciouscircleson0000barw_b0k1|Vicious Circles. On the Mathematics of Non-Wellfounded Phenomena) {{ISBN|1-57586-008-2}}JOURNAL, Rutten, J. J. M. M., Review of Vicious circles: On the mathematics of non-wellfounded phenomena by Jon Barwise and Larry Moss, Bull. Amer. Math. Soc. (N.S.), 1998, 35, 1, 69–75,www.ams.org/journals/bull/1998-35-01/S0273-0979-98-00735-6/S0273-0979-98-00735-6.pdf, 10.1090/s0273-0979-98-00735-6, free,
• Barwise, K, J. & Seligman, J. (1997) (iarchive:informationflowl0000barw|Information Flow: the Logic of Distributed Systems) {{ISBN|0-521-58386-1}}
• Barwise, K. J. & Etchemendy, J. (2002) (iarchive:languageprooflog00barw|Language, Proof and Logic) {{ISBN|1-57586-374-X}}
• Barwise, K. J. Editor (1977) Handbook of Mathematical Logic. xi+1165 pages {{ISBN|0-7204-2285-X}}
• Barwise, J. & Feferman, S. Editors (1985) Model-Theoretic Logics. x+893 pages {{ISBN|0-387-90936-2}}

See also

• Barwise Prize
• Barwise compactness theorem
• Slingshot argument

References

{{Reflist}}

External links

• In Memoriam: Kenneth Jon Barwise by Solomon Feferman The Bulletin of Symbolic Logic vol. 6(4) Dec. 2000, pp505–8 (PostScript)
• {{MathGenealogy|id=9274|title=K. Jon (Kenneth) Barwise}}

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