John Lemmon

Edward John Lemmon (1 June 1930 – 29 July 1966) was a British logician and philosopher. Born in Sheffield, England, he is primarily recognized for his contributions to modal logic. Lemmon received his education at King Edward VII School, Sheffield, and then pursued Literae humaniores at Magdalen College, Oxford. He was appointed a Fellow at Trinity College, Oxford, in 1957. After a visiting professorship in Texas, Lemmon moved to the United States in 1963, where he lectured at the Claremont Graduate School. His academic career was cut short when he died from heart failure while engaged in climbing. Lemmon's work on modal logic, particularly his collaboration with Dana Scott, significantly influenced the field. He was also known for his interest in tense logic and his development of non-normal modal logics. His writings explored alethic and epistemic modalities, and he contributed to the understanding of modal logic semantics.