Kuno Lorenz
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Kuno Lorenz (born September 17, 1932 in Vachdorf,
Thüringen Thuringia (; german: Thüringen ), officially the Free State of Thuringia ( ), is a state of central Germany, covering , the sixth smallest of the sixteen German states. It has a population of about 2.1 million. Erfurt is the capital and larg ...
) is a
German German(s) may refer to: * Germany (of or related to) **Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Ger ...
philosopher. He developed a philosophy of dialogue, in connection with the pragmatic theory of action of the
Erlangen Erlangen (; East Franconian: ''Erlang'', Bavarian: ''Erlanga'') is a Middle Franconian city in Bavaria, Germany. It is the seat of the administrative district Erlangen-Höchstadt (former administrative district Erlangen), and with 116,062 inhabi ...
constructivist school. Lorenz is married to the literary scholar
Karin Lorenz-Lindemann Karin may refer to: * Karin (given name), a feminine name Fiction * ''Karin'' (manga) or ''Chibi Vampire'', a Japanese media franchise * Karin Hanazono, title character of the manga and anime ''Kamichama Karin'' * Karin Kurosaki, a character in ' ...
.


Career

After studying mathematics and physics in
Tübingen Tübingen (, , Swabian: ''Dibenga'') is a traditional university city in central Baden-Württemberg, Germany. It is situated south of the state capital, Stuttgart, and developed on both sides of the Neckar and Ammer rivers. about one in thre ...
,
Hamburg Hamburg (, ; nds, label=Hamburg German, Low Saxon, Hamborg ), officially the Free and Hanseatic City of Hamburg (german: Freie und Hansestadt Hamburg; nds, label=Low Saxon, Friee un Hansestadt Hamborg),. is the List of cities in Germany by popul ...
,
Bonn The federal city of Bonn ( lat, Bonna) is a city on the banks of the Rhine in the German state of North Rhine-Westphalia, with a population of over 300,000. About south-southeast of Cologne, Bonn is in the southernmost part of the Rhine-Ru ...
and
Princeton Princeton University is a private research university in Princeton, New Jersey. Founded in 1746 in Elizabeth as the College of New Jersey, Princeton is the fourth-oldest institution of higher education in the United States and one of the ni ...
, Lorenz earned his Ph.D. in 1961 under Paul Lorenzen in
Kiel Kiel () is the capital and most populous city in the northern German state of Schleswig-Holstein, with a population of 246,243 (2021). Kiel lies approximately north of Hamburg. Due to its geographic location in the southeast of the Jutland pe ...
with a thesis about ''Arithmetic and Logic as Games''. In 1969 he received his
habilitation Habilitation is the highest university degree, or the procedure by which it is achieved, in many European countries. The candidate fulfills a university's set criteria of excellence in research, teaching and further education, usually including ...
degree in philosophy also under Lorenzen but this time in
Erlangen Erlangen (; East Franconian: ''Erlang'', Bavarian: ''Erlanga'') is a Middle Franconian city in Bavaria, Germany. It is the seat of the administrative district Erlangen-Höchstadt (former administrative district Erlangen), and with 116,062 inhabi ...
. In 1970 he was offered the chair of philosophy at the University of Hamburg to succeed
Carl Friedrich von Weizsäcker Carl Friedrich Freiherr von Weizsäcker (; 28 June 1912 – 28 April 2007) was a German physicist and philosopher. He was the longest-living member of the team which performed nuclear research in Germany during the Second World War, under ...
. From 1974 till his retirement in 1997 he taught at the University of Saarland in Saarbrücken. Among his former students is Arno Ros.


Dialogue and predication

Lorenz developed (along with Paul Lorenzen) an approach to arithmetic and logic as dialogue games. In dialogical logic (
game semantics Game semantics (german: dialogische Logik, translated as '' dialogical logic'') is an approach to formal semantics that grounds the concepts of truth or validity on game-theoretic concepts, such as the existence of a winning strategy for a player ...
), tree calculations (generally, of
Gentzen Gerhard Karl Erich Gentzen (24 November 1909 – 4 August 1945) was a German mathematician and logician. He made major contributions to the foundations of mathematics, proof theory, especially on natural deduction and sequent calculus. He died ...
-type calculus) are written upside down, so that the initial assertion of a proponent stays above and is defended against an opponent as in a game. This is a linguistically more congenial approach to logic, which is more suitable as a model for argumentation than the formal derivation in a calculus or
truth table A truth table is a mathematical table used in logic—specifically in connection with Boolean algebra (logic), Boolean algebra, boolean functions, and propositional calculus—which sets out the functional values of logical expression (mathematics) ...
s. Lorenz presented for the first time a simple demonstration of
Gentzen's consistency proof Gentzen's consistency proof is a result of proof theory in mathematical logic, published by Gerhard Gentzen in 1936. It shows that the Peano axioms of first-order arithmetic do not contain a contradiction (i.e. are " consistent"), as long as a c ...
on this game-theoretic basis. If one regards logic and mathematics in this way as a game, an
intuitionist In the philosophy of mathematics, intuitionism, or neointuitionism (opposed to preintuitionism), is an approach where mathematics is considered to be purely the result of the constructive mental activity of humans rather than the discovery of ...
approach becomes a more plausible option.


Dialogical constructivism

Not only logic, but the whole of philosophy is given a dialogical treatment by Lorenz. Only in the mirror of a relative Other is it possible to reflect upon oneself. Lorenz developed a dialogical constructivism from the focus on the dialogical principle (Martin Buber) and the process of language games of the later
Ludwig Wittgenstein Ludwig Josef Johann Wittgenstein ( ; ; 26 April 1889 – 29 April 1951) was an Austrian- British philosopher who worked primarily in logic, the philosophy of mathematics, the philosophy of mind, and the philosophy of language. He is cons ...
. In addition, the pragmatism of
Charles Sanders Peirce Charles Sanders Peirce ( ; September 10, 1839 – April 19, 1914) was an American philosopher, logician, mathematician and scientist who is sometimes known as "the father of pragmatism". Educated as a chemist and employed as a scientist for ...
and the historicism of Wilhelm Dilthey are complementary juxtaposed.


Publications

*1969 with Jürgen Mittelstraß: ''Die methodische Philosophie Hugo Dinglers'' Einleitung zum Nachdruck von: Hugo Dingler ''Die Ergreifung des Wirklichen'' Kapitel I-IV. Suhrkamp, Frankfurt (Reihe ''Theorie 1'') S. 7-55 *1970 ''Elemente der Sprachkritik'' Eine Alternative zum Dogmatismus und Skeptizismus in der Analytischen Philosophie Suhrkamp, Frankfurt (Reihe ''Theorie'') *1977 ''Einführung'' zu: Richard Gätschenberger ''Zeichen, die Fundamente des Wissens'' Zweite, unveränd. Aufl., vermehrt um eine Einführung von Kuno Lorenz. (Nachdr. v. 1932) frommann-holzboog, Stuttgart (''problemata; 59'') *1978 with Paul Lorenzen: ''Dialogische Logik'' WBG, Darmstadt *1978 (Hrsg.): ''Konstruktionen versus Positionen'' Beiträge zur Diskussion um die konstruktive Wissenschaftstheorie. Paul Lorenzen zum 60. Geburtstag. de Gruyter, Berlin, New York *1980 ''
Sprachphilosophie In analytic philosophy, philosophy of language investigates the nature of language and the relations between language, language users, and the world. Investigations may include inquiry into the nature of meaning, intentionality, reference, the ...
'' in: Althaus u.a. (Hrsg.): ''Lexikon der germanistischen Linguistik'' Niemeyer, Tübingen *1982 (Hrsg.): ''Identität und Individuation'' (2 Bde.) frommann-holzboog, Stuttgart *1986 ''Dialogischer Konstruktivismus'' In: K. Salamun (Hrsg.): ''Was ist Philosophie?'' Mohr, Tübingen *1990 ''Einführung in die philosophische Anthropologie'' WBG, Darmstadt ²1992 * 1992/6 with M. Dascal, D. Gerhardus und G. Meggle) (Hrsg.): ''Sprachphilosophie'' Ein internationales Handbuch zeitgenössischer Forschung (2 Halbbde.) Berlin/New York *1998 ''Indische Denker'' Beck, München
(Rezension
*2009 ''Dialogischer Konstruktivismus'' de Gruyter, Berlin, New York


Further reading

* Gerhardus, Dietfried und Silke M. Kledzik (Hrsg.): ''Vom Finden und Erfinden in Kunst, Philosophie, Wissenschaft'': k(l)eine Denkpause für Kuno Lorenz zum 50. Geburtstag. Universitätsdruck, Saarbrücken 1985 * Astroh, Michael (Hrsg.): ''Dialogisches Handeln'': eine Festschrift für Kuno Lorenz. Spektrum, Heidelberg 1997


External links


Literature of and about Kuno Lorenz
in the catalog of the German National Library (record Kuno Lorenz • PICA-Record) {{DEFAULTSORT:Lorenz, Kuno Philosophers of language 20th-century German philosophers 21st-century German philosophers Game theorists German logicians Modal logicians Philosophers of mathematics 1932 births Living people German male writers