Belgian-Swedish, b: 10 August 1891, Ledeberg, Belgium, d: 28 March 1977, Tierp, Sweden. Cat: Analytical philosopher; mathematician. Ints: Ontology; philosopy of mind. Educ: After studies in Mathematics and Physics, Dr sc. at Ghent 1914. Also studied Philosophy at Uppsala University. Infls: Husserl and Phalén. Appts: Taught Mathematics and Physics in Belgium; 1939-77, residing in Sweden, where he devoted all his time to philosophical writing; 1960, Fil. Dr. honoris causa, Uppsala University.
Andries Mac Leod started as a mathematician. His first book (in French, 1922) was a comprehensive survey of non-Euclidean geometry. His mathematical training is evident in all the philosophical works, in the rigorous shaping of proofs and definitions. His philosophical method is well illustrated by the paper 'What is a true assertion?' (1947). In most of his works he deals with abstract problems related to fundamental concepts of our thinking, for example reality, identity, negation, 'now', act of consciousness and intentionality.
Husserl's Logische Untersuchungen influenced Mac Leod, but he was even more influenced by Phalén, whom he deeply admired. The Nature and Content of an Act of Consciousness (1960) gives a subtle analysis of problems connected with Phalén's thesis (criticized by Segelberg) that an act of consciousness intending AB is not composed of an act intending A and an act intending B. There are interesting differences between Mac Leod and Phalén on certain important problems, for example concerning the relation of mental phenomena to time. Mac Leod developed a nominalist theory which has certain points in common with that of Nelson Goodman, although historically they are quite independent of each other.
Australian, b: 11 July 1925, Melbourne, Australia. Cat: Ethical institutionist; political liberal. Ints: Moral philosophy; political philosophy; environmental philosophy. Educ: University of Melbourne (BA 1948, MA 1949, PhD 1952, LittD 178). Infls: W.D. Ross, J. Passmore and J.L. Mackie. Appts: 1953-5, Lecturer in Philosophy, University of Western Australia, Nedlands; 1955-69, Lecturer, Senior Lecturer and Reader in Philosophy, University of Melbourne, Parkville; from 1969, Professor of Philosophy, La Trobe University, Bundoora.