John Randolph Lucas (18 June 1929 – 5 April 2020) was a

British philosopher This page provides a list of British philosophers; of people who either worked within Great Britain, or the country's citizens working abroad. __NOTOC__ A * A.J. Ayer B * Francis Bacon * Roger Bacon * Julian Baggini * Thomas Baldwin * Alexande ...

Biography

Lucas was educated at Winchester College and then, as a pupil of R.M. Hare, among others, at

Balliol College, Oxford Balliol College () is one of the constituent colleges of the University of Oxford in England. One of Oxford's oldest colleges, it was founded around 1263 by John I de Balliol, a landowner from Barnard Castle in County Durham, who provided the f ...

. He studied first mathematics, then Greats (Greek, Latin, Philosophy and Ancient History), obtaining first class honours in both. He sat for Finals in 1951, and took his MA in 1954. He spent the 1957–58 academic year at Princeton University, studying mathematics and logic. For 36 years, until his 1996 retirement, he was a Fellow and Tutor of

Merton College, Oxford Merton College (in full: The House or College of Scholars of Merton in the University of Oxford) is one of the Colleges of Oxford University, constituent colleges of the University of Oxford in England. Its foundation can be traced back to the ...

, and he remained an emeritus member of the University Faculty of Philosophy. He was a Fellow of the British Academy. Lucas is perhaps best known for his paper " Minds, Machines and Gödel," arguing that an automaton cannot represent a human mathematician, attempting to refute computationalism. An author with diverse teaching and research interests, Lucas wrote on the philosophy of mathematics, especially the implications of Gödel's incompleteness theorem, the philosophy of mind,

free will and determinism Free may refer to: Concept * Freedom, having the ability to do something, without having to obey anyone/anything * Freethought, a position that beliefs should be formed only on the basis of logic, reason, and empiricism * Emancipate, to procure ...

, the philosophy of science including one book on physics co-authored with

Peter E. Hodgson Peter E. Hodgson (27 November 1928, London – 8 December 2008) was a British physicist, who also wrote about the philosophy of physics and social issues, and was an active Roman Catholic. Early life Peter E. Hodgson was born on 27 November ...

causality Causality (also referred to as causation, or cause and effect) is influence by which one event, process, state, or object (''a'' ''cause'') contributes to the production of another event, process, state, or object (an ''effect'') where the cau ...

, political philosophy, ethics and

business ethics Business ethics (also known as Corporate Ethics) is a form of applied ethics or professional ethics, that examines ethical principles and moral or ethical problems that can arise in a business environment. It applies to all aspects of business co ...

, and the philosophy of religion. The son of a Church of England clergyman, and an Anglican himself, Lucas described himself as "a dyed-in-the-wool traditional Englishman." He had four children
EdwardHelenRichard
and Deborah) with Morar Portal, among them Edward Lucas, a former journalist at '' The Economist''. In addition to his philosophical career, Lucas had a practical interest in

. He helped found the Oxford Consumers' Group, and was its first chairman in 1961–3, serving again in 1965.

Philosophical contributions

Free will

Lucas (1961) began a lengthy and heated debate over the implications of

Gödel's incompleteness theorems Gödel's incompleteness theorems are two theorems of mathematical logic Mathematical logic is the study of logic, formal logic within mathematics. Major subareas include model theory, proof theory, set theory, and recursion theory. Research i ...

for the anthropic mechanism thesis, by arguing that: #

Determinism Determinism is a philosophical view, where all events are determined completely by previously existing causes. Deterministic theories throughout the history of philosophy have developed from diverse and sometimes overlapping motives and consi ...

↔ For any human ''h'' there exists at least one (deterministic)

logical system A formal system is an abstract structure used for inferring theorems from axioms according to a set of rules. These rules, which are used for carrying out the inference of theorems from axioms, are the logical calculus of the formal system. A form ...

''L''(''h'') which reliably predicts ''hs actions in all circumstances. # For any logical system ''L'' a sufficiently skilled mathematical logician (equipped with a sufficiently powerful computer if necessary) can construct some statements ''T''(''L'') which are true but unprovable in ''L''. (This follows from Gödel's first theorem.) # If a human ''m'' is a sufficiently skillful mathematical logician (equipped with a sufficiently powerful computer if necessary) then if ''m'' is given ''L''(''m''), he or she can construct ''T''(''L''(''m'')) and determine that they are true—which ''L''(''m'') cannot do. # Hence ''L''(''m'') does not reliably predict ''ms actions in all circumstances. # Hence ''m'' has free will. # It is implausible that the qualitative difference between mathematical logicians and the rest of the population is such that the former have free will and the latter do not. His argument was strengthened by the discovery by Hava Siegelmann in the 1990s that sufficiently complex analogue recurrent neural networks are more powerful than Turing Machines.

Space, time and causality

Lucas wrote several books on the philosophy of science and space-time (see below). In ''A treatise on time and space'' he introduced a transcendental derivation of the Lorenz Transformations based on Red and Blue exchanging messages (in Russian and Greek respectively) from their respective frames of reference which demonstrates how these can be derived from a minimal set of philosophical assumptions. In ''The Future'' Lucas gives a detailed analysis of tenses and time, arguing that "the Block universe gives a deeply inadequate view of time. It fails to account for the passage of time, the pre-eminence of the present, the directedness of time and the difference between the future and the past" and in favour of a tree structure in which there is only one past or present (at any given point in spacetime) but a large number of possible futures. "We are by our own decisions in the face of other men's actions and chance circumstances weaving the web of history on the loom of natural necessity"''The Future'' (1989), p. 4.

Timeline

*1942-7. Scholar of Winchester College *1947–51. Attended

on a scholarship. *1951. BA with 1st Class Honours, Greats. *1951-3. Harmsworth Senior Scholar,

. *1952. John Locke Scholarship, Oxford University. *1953-6. Junior Research Fellow,

. *1956-9. Fellow and Assistant Tutor,

Corpus Christi College, Cambridge Corpus Christi College (full name: "The College of Corpus Christi and the Blessed Virgin Mary", often shortened to "Corpus"), is a constituent college of the University of Cambridge. From the late 14th century through to the early 19th century ...

. *1957-8. Jane Eliza Procter Visiting Fellow, Princeton University. *1959–60. Leverhulme Research Fellow, the University of Leeds. *1960–96. Fellow and Tutor of

. *1988. Elected a Fellow of the British Academy. *1990-6. Reader in Philosophy, Oxford University. *1991-3. President,

British Society for the Philosophy of Science The British Society for the Philosophy of Science (BSPS) is a philosophy, philosophical learned society, society based in the United Kingdom that aims to further the philosophy of science, and which manages the ''British Journal for the Philosophy o ...

Books

*1966. ''Principles of Politics''. *1970. '' The Concept of Probability''. *1970. ''The Freedom of the Will''. *1972
''The Nature of Mind''
(with

A. J. P. Kenny Sir Anthony John Patrick Kenny (born 16 March 1931) is a British philosopher whose interests lie in the philosophy of mind, ancient and scholastic philosophy, the philosophy of religion, and the philosophy of Wittgenstein of whose literary e ...

, H. C. Longuet-Higgins, and

C. H. Waddington Conrad Hal Waddington (8 November 1905 – 26 September 1975) was a British developmental biologist, paleontologist, geneticist, embryologist and philosopher who laid the foundations for systems biology, epigenetics, and evolutionary developme ...

; 1972 Gifford Lectures) *1973
''The Development of Mind''
(with A. J. P. Kenny, H.C.Longet-Higgins, and C.H.Waddington; 1973 Gifford Lectures) *1973. '' A Treatise on Time and Space''. *1976. '' Freedom and Grace''. *1976. ''Democracy and Participation''. *1978. ''Butler's Philosophy of Religion Vindicated''. *1980. ''

On Justice ''On Justice'' ( grc-gre, Περὶ Δικαίου; la, De Justo) is a Socratic dialogue that was once thought to be the work of Plato. The attribution to Plato is now considered spurious In the short dialogue, Socrates discusses with a friend ...

''. *1985. ''Space, Time and Causality: an essay in natural philosophy''. *1989. '' The Future: an essay on God, temporality, and truth'' *1990. ''Spacetime and Electromagnetism'' (with

) . *1993. '' Responsibility''. *1997. ''Ethical Economics'' (with M. R. Griffiths). *2000. ''Conceptual Roots of Mathematics''. *2003. ''An Engagement with Plato's Republic'' (with B.G. Mitchell). *2006. ''Reason and Reality'', freely available as a series of .pdf files on Lucas's website (below). Also available as ''Reason and Reality: An Essay in Metaphysics'' by J. R. Lucas (494 pages, December 2009): Hardback is and Softback is *2016. ''Value Economics: The Ethical Implications of Value for New Economic Thinking'' (with M.R. Griffiths). *2021. ''L’economia del valore'' (Italian translation, also with M.R. Griffiths).