JEAN CURTHOYS taught Philosophy at Sydney University, Australia, until her retirement.
ASSOCIATE PROFESSOR V.H. DUDMAN taught Logic for many years at Macquarie University, Australia. In the earlier part of his career he was a Frege scholar and one of his translators. In his later years he worked on his own original English grammar and its application to problems in logic, most notably those concerning conditionals. He died in 2009.