David Malet Armstrong Professions : Philosopher Born : July 8, 1926 Died : May 13, 2014 Browse All Authors Top 3 quotes by David Malet Armstrong The concept of a mental state is primarily the concept of a state of the person apt for bringing about a certain sort of behaviour. David Malet Armstrong certain behaviour states To accept Naturalism is to reject such entities as Cartesian minds, private visual and tactual spaces, angelic beings and God. David Malet Armstrong accepting space mind Mathematics is concerned with "all possible worlds." David Malet Armstrong mathematics-by-mathematicians mathematics world Similar Authors F. H. Bradley philosopher Irving Copi philosopher Ivan Ilyin philosopher Ivan Illich philosopher Bion of Borysthenes philosopher Bonaventure philosopher All Authors