Polemical British Catholic logician and moral philosopher, who was professor at Leeds from 1966 to 1981. Geach's notable work on logical theory included Reference and Generality: An Examination of some Modern and Medieval Theories (1962) and Logic Matters (1972). He also translated and edited many of the writings of Frege, while moral and theological concerns are visible in God and the Soul (1969). His deployment of points due to Frege against expressivism have been much debated. See Frege-Geach argument.