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.
Middle range theory (sociology) Middle-range theory, developed by Robert K. Merton, is an approach to sociological theorizing aimed at integrating theory and empirical research. It is currently the de facto dominant approach to sociological theory construction, especially in the United States. Middle-range theory starts with an empirical phenomenon (as opposed to a broad abstract entity like the social system) and abstracts from it to create general statements that can be verified by data. This approach stands in contrast to the earlier "grand" theorizing of social theory, such as functionalism and many conflict theories. Raymond Boudon has argued that 'middle-range' theory is the same concept that most other sciences simply call 'theory'. The analytical sociology movement has as its aim the unification of such theories into a coherent paradigm at a greater level of abstraction.