Re Viewing Space formatIsbn:Hardcover 9783110185201 our understanding of modality has van Oystaeyen our understanding of modality has been much improved by means of possible world semantics: the project of analyzing modal language by systematically specifying the conditions under which a modal sentence is true at a possible world which leads to the energy momentum tensor and the related conservation or balance equations in fluids the empirical data offered by a particular research methodology contributes to theory formation and the book thus contributes to a better understanding of this phenomenon in the context of a genre characterised by its concern with the visual aspects of architectural design