Donald Gillies studied mathematics and philosophy at Cambridge as an undergraduate. In 1966 he began graduate studies in Professor Sir Karl Popper's department at the London School of Economics, and he completed his PhD on the foundations of probability in 1970 with Professor Imre Lakatos as supervisor. From 1968 to 1971, he was a Fellow of King's College, Cambridge, and thereafter followed a career at London University until his retirement in 2009. He is currently Emeritus Professor of Philosophy of Science and Mathematics at University College London. Donald Gillies developed an interest in the philosophy of AI in the 1990s, participating in two AI projects, as well as organizing two further projects in the philosophy of AI.Marco Gillies is a Professor of Computing at Goldsmiths, University of London, and an expert on AI virtual humans for virtual reality. After completing his PhD at the University of Cambridge, he did post-doctoral work, and, in 2005, he published one of the first papers to apply machine learning to virtual humans. At Goldsmiths, a creative university famous for the Young British Artists Movement, he has helped pioneer the application of AI to the arts, including founding the Creative Computing Degree in 2008. His work since then has focused on human-centred and interdisciplinary AI, including working with dancers, psychologists, game developers, clinicians, and education researchers. His current work focuses on augmenting large language models (LLMs) with body language for natural communication.