This paper is intended to throw light on the way architectural designs are created and reports on case studies of the architectural design process which were included in the professional development programme of a large organisation. They provided an opportunity for designers to explain their personal understanding of a design problem to other designers and to have it questioned. This interaction not only revealed prejudices and preconceptions about design problems, but also led to the emergence of unforeseen solutions. The paper concludes by asking whether conflicts between designers can be considered the general matrix for creative thought.