The authors of model-dependent realism claim that what type of theory may not exist?
The Grand Design (book) The Grand Design is a popular-science book written by physicists Stephen Hawking and Leonard Mlodinow and published by Bantam Books in 2010. The book examines the history of scientific knowledge about the universe and explains 11 dimension M-theory. The authors of the book point out that a Unified Field Theory (a theory, based on an early model of the universe, proposed by Albert Einstein and other physicists) may not exist.
Non-representational theory Non-representational theory is a theory developed in human geography, largely through the work of Nigel Thrift (Warwick University), and his colleagues such as J.D. Dewsbury (University of Bristol) and Derek McCormack (University of Oxford); and indeed, later, by their respective graduate students who have pushed non-representational thinking in various empirical registers.