Architectural science appears to have lost the respect of architects, perhaps because most of what passes for it is technology. Science is the postulation and testing of hypotheses to replace those that have become suspect. Like the practice of architecture, this requires a re-iterative heuristic, through critical observation, imaginative invention and rigorous testing to critical observation again. Romantics, therefore, need not fear the importation of science into the architectural process: nor, indeed, into any other aspect of life.