Michael Dummett

Sir Michael Anthony Eardley Dummett, FBA (27 June 1925 – 27 December 2011) was an English academic described as "among the most significant British philosophers of the last century and a leading campaigner for racial tolerance and equality." He was, until 1992, Wykeham Professor of Logic at the University of Oxford. He wrote on the history of analytic philosophy, notably as an interpreter of Frege, and made original contributions particularly in the philosophies of mathematics, logic, language and metaphysics. He was known for his work on truth and meaning and their implications to debates between realism and anti-realism, a term he helped to popularize. He devised the Quota Borda system of proportional voting, based on the Borda count. In mathematical logic, he developed an intermediate logic, already studied by Kurt Gödel: the Gödel–Dummett logic.

Education and army service
Dummett was the son of a merchant of silks. He studied at Sandroyd School and was a First Scholar at Winchester College, later winning a Major Scholarship to study History at Christ Church, Oxford in 1943. He was called up that year and served, initially as a private in the Royal Artillery before joining the Intelligence Corps in India and Malaya. He was also awarded a fellowship to All Souls College, Oxford.

Academic career
In 1979, Dummett became Wykeham Professor of Logic at Oxford, a post he held until retiring in 1992. During his term as Wykeham Professor, he held a Fellowship at New College, Oxford. He has also held teaching posts at Birmingham University, UC Berkeley, Stanford University, Princeton University, and Harvard University. He won the Rolf Schock prize in 1995, and was knighted in 1999. He was the 2010 winner of the Lauener Prize for an Outstanding Œuvre in Analytical Philosophy.

During his career at Oxford, he supervised many philosophers who have gone on to distinguished careers, including Peter Carruthers, Adrian Moore, Ian Rumfitt, and Crispin Wright.

Philosophical work
His work on the German philosopher Frege has been acclaimed. His first book Frege: Philosophy of Language (1973), written over many years, is now regarded as a classic. The book was instrumental in the rediscovery of Frege's work, and influenced a generation of British philosophers.

In his 1963 paper "Realism", he popularised a controversial approach to understanding the historical dispute between realist and other non-realist philosophy such as idealism, nominalism, Irrealism. He characterized all of the latter as anti-realist and argued that the fundamental disagreement between realist and anti-realist was over the nature of truth. For Dummett, realism is best understood as semantic realism, i. e., as the view accepting that every declarative sentence of one's language is bivalent (determinately true or false) and evidence-transcendent (independent of our means of coming to know which), while anti-realism rejects this view in favour of a concept of knowable (or assertible) truth. Historically, these debates had been understood as disagreements about whether a certain type of entity objectively exists or not. Thus we may speak of (anti-)realism with respect to other minds, the past, the future, universals, mathematical entities (such as natural numbers), moral categories, the material world, or even thought. The novelty of Dummett's approach consisted in seeing these disputes as at base, analogous to the dispute between intuitionism and Platonism in the philosophy of mathematics.

Franzane Abella commented that Dummett was really interested not in understanding problems via classical logic but via intutionistic logic, and Abella stated that "such mathematical entities are more likely to be an ontological myth for Dummett... because truth cannot be unidentified via intuition, and of course it will fall on the notion of logical opaqueness, which statements are not likely to be understood easily in the first place." Franzane Abella further added that "Dummett has an astounding influence when he brought forward the deep-order justificationist semantics; this influenced the theory of meaning and the classification of understanding via practices, whether the statement can be refuted or not based on its meaning." Abella summed up by saying that Dummett refuted the theory brought forward by realism about the cognisance of meaning. For example, the psychological change in our conceptions of meaning of any statements should be properly grasped, because if not, there exists an alteration and confusion of meaning, and of course a failure in grasping truth-values.

Dummett espoused semantic anti-realism, a position suggesting that truth cannot serve as the central notion in the theory of meaning and must be replaced by verifiability. Semantic anti-realism is sometimes related to semantic inferentialism.

Activism
Dummett was politically active, through his work as a campaigner against racism. He let his philosophical career stall in order to influence civil rights for minorities during what he saw as a crucial period of reform in the late 1960s. He also worked on the theory of voting, which led to his introduction of the Quota Borda system.

Dummett drew heavily on his work in this area in writing his book On Immigration and Refugees, an account of what justice demands of states in relationship to movement between states. Dummett in that book argues that the vast majority of opposition to immigration has been founded in racism and says that this has especially been so in the UK.

He has written of his shock on finding anti-Semitic and fascist opinions in the diaries of Frege, to whose work he had devoted such a high proportion of his professional career.

In 1955–1956, while staying in Berkeley, California, Dummett and his wife joined NAACP. In June 1956 he met with Martin Luther King, who visited San Francisco, and heard from him of Alistair Cooke providing the British public with what King defined as "biased and hostile reports" of the Civil Rights Movement and specifically of the Montgomery Bus Boycott. Dummett travelled to Montgomery and wrote his own account. However, The Guardian refused to publish Dummett's article and his refutation of Cook's version of the Montgomery events, even in a shortened account as a Letter to the Editor; the BBC, too, also refused to publish it.

Elections and voting
Dummett and Robin Farquharson published influential articles on the theory of voting, in particular conjecturing that deterministic voting rules with more than three issues faced endemic strategic voting. The Dummett–Farquharson conjecture was proved by Allan Gibbard, a philosopher and former student of Kenneth J. Arrow and John Rawls, and by the economist Mark A. Satterthwaite.

After the establishment of the Farquarson–Dummett conjecture by Gibbard and Sattherthwaite, Dummett contributed three proofs of the Gibbard–Satterthwaite theorem in his monograph on voting. He also wrote a shorter overview of the theory of voting for the educated public.

Card games and tarot
Dummett was a scholar in the field of card games history, with numerous books and articles to his credit. He is a founding member of the International Playing-Card Society, in whose journal The Playing-Card he regularly published opinions, research and reviews of current literature on the subject; he is also a founder of the Accademia del Tarocchino Bolognese in Bologna. His historical work on the use of the tarot pack in card games — "(t)he fortune telling and occult part of it has never been my principal interest..." — The Game of Tarot: From Ferrara to Salt Lake City, attempted to establish that the invention of Tarot could be set in 15th-century Italy. He laid the foundation for most of the subsequent research on the game of tarot, including exhaustive accounts of the rules of all hitherto known forms of the game.

Dummett's analysis of the historical evidence suggested that fortune-telling and occult interpretations were unknown before the 18th century. During most of their recorded history, he wrote, Tarot cards were used to play an extremely popular trick-taking game which is still enjoyed in much of Europe. Dummett showed that the middle of the 18th century saw a great development in the game of Tarot, including a modernized deck with French suit-signs, and without the medieval allegories that interest occultists, along with a growth in Tarot's popularity. "The hundred years between about 1730 and 1830 were the heyday of the game of Tarot; it was played not only in northern Italy, eastern France, Switzerland, Germany and Austro-Hungary, but also in Belgium, the Netherlands, Denmark, Sweden and even Russia. Not only was it, in these areas, a famous game with many devotees: it was also, during that period, more truly an international game than it had ever been before or than it has ever been since...."

In 1987, Dummett collaborated with Giordano Berti and Andrea Vitali to the project of the great Tarot exhibition at Castello Estense in Ferrara; on that occasion he wrote some texts for the catalogue of the exhibition.

Conversion to Roman Catholicism
In 1944, he was received into the Roman Catholic Church, and remained a practising Catholic. Throughout his career, Dummett published a number of articles on various issues facing the contemporary Catholic Church, mainly in the English Dominican journal, New Blackfriars. Dummett published an essay in the bulletin of the Adoremus Society on the subject of liturgy, and a philosophical essay defending the intelligibility of the Catholic Church's teaching on the Eucharist.

In October 1987, one of his contributions to New Blackfriars sparked controversy, when he seemingly attacked currents of Catholic theology which appeared to him to diverge from orthodox Catholicism and to "imply that, from the very earliest times, the Catholic Church, claiming to have a mission from God to safeguard divinely revealed truth, has taught and insisted on the acceptance of falsehoods." Dummett argued that "the divergence which now obtains between what the Catholic Church purports to believe and what large or important sections of it in fact believe ought, in my view, to be tolerated no longer: not if there is to be a rationale for belonging to that Church; not if there is to be any hope of reunion with the other half of Christendom; not if the Catholic Church is not to be a laughing-stock in the eyes of the world." A debate in the journal over these remarks continued for months, attracting contributions from the theologian Nicholas Lash and the historian Eamon Duffy, among others.

Later years and family
Dummett retired in 1992 and was knighted in 1999 for "services to philosophy and to racial justice". He received the Lakatos Award in the philosophy of science in 1994.

Dummett died in 2011, aged 86. He was survived by his wife Ann, whom he had married in 1951 (and who died in 2012), and by three sons and two daughters. A son and daughter predeceased their parents.

Works

 * On analytical philosophy and logic:
 * Frege: Philosophy of Language (Harvard University Press, 1973/1981)
 * The Interpretation of Frege's Philosophy, Duckworth, 1981; Harvard University Press
 * Elements of Intuitionism (Oxford, 1977, 2000)
 * Truth and Other Enigmas (Harvard University Press, 1978)
 * Frege: Philosophy of Mathematics (Harvard University Press, 1991)
 * The Logical Basis of Metaphysics (Harvard University Press, 1991)
 * Origins of Analytical Philosophy (Harvard University Press, 1993)
 * The Seas of Language (Oxford, 1993)
 * Frege and Other Philosophers (Oxford, 1991)
 * Truth and the Past (Oxford, 2005)
 * Thought and Reality (Oxford, 2006)
 * The Nature and Future of Philosophy (Columbia, 2010)
 * On voting theory and election systems:
 * Voting Procedures (Oxford, 1984)
 * Principles of Electoral Reform (New York, 1997) ISBN 0-19-829246-5
 * On politics:
 * On Immigration and Refugees (London, 2001)
 * Tarot works:
 * The Game of Tarot: from Ferrara to Salt Lake City (Duckworth, 1980)
 * Twelve Tarot Games (Duckworth, 1980)
 * The Visconti-Sforza Tarot Cards (G. Braziller, 1986)
 * Il mondo e l'angelo: i tarocchi e la loro storia (Bibliopolis, 1993)
 * I tarocchi siciliani (La Zisa, 1995)
 * A Wicked Pack of Cards: The Origins of the Occult Tarot (with Ronald Decker and Thierry Depaulis, St. Martin's Press, 1996)
 * A History of the Occult Tarot, 1870-1970 (with Ronald Decker, Duckworth, 2002)
 * A History of Games Played with the Tarot Pack (with John McLeod, E. Mellen Press, 2004)
 * A Wicked Pack of Cards: The Origins of the Occult Tarot (with Ronald Decker and Thierry Depaulis, St. Martin's Press, 1996)
 * A History of the Occult Tarot, 1870-1970 (with Ronald Decker, Duckworth, 2002)
 * A History of Games Played with the Tarot Pack (with John McLeod, E. Mellen Press, 2004)

Notable articles and exhibition catalogues include "Tarot Triumphant: Tracing the Tarot" in FMR, (Franco Maria Ricci International), January/February 1985; Pattern Sheets published by the International Playing Card Society; with Giordano Berti and Andrea Vitali, the catalogue Tarocchi: Gioco e magia alla Corte degli Estensi (Bologna, Nuova Alfa Editorale, 1987).


 * On the written word:
 * Grammar and Style (Duckworth, 1993)