Andrew Gordon Speedie Pask (28 June 1928 – 29 March 1996) was a British cybernetician, inventor and polymath who made multiple contributions to cybernetics, educational psychology, educational technology, applied epistemology, chemical computing, architecture, and systems art. During his life, he gained three doctorate degrees. He was an avid writer, with more than two hundred and fifty publications which included a variety of journal articles, books, periodicals, patents, and technical reports. He worked as an academic and researcher for a variety of educational settings, research institutes, and private stakeholders including but not limited to the University of Illinois, Concordia University, the Open University, Brunel University and the Architectural Association School of Architecture. He is known for the development of conversation theory.