Abstract
Design can be thought of as a model for such endeavours as are intended to result in industrially manufactured products by means of thinking and other intellectual activity. Familiarity with the thinking involved in the designing process is important, not only for those engaged in training designers, but for anyone desirous of systemizing the endeavour. One procedure for approaching an understanding of the way designers think is to describe it with the help of different metaphors. There are some metaphors for thinking about complicated and interrelated phenomena that should lend themselves to illustrating the thinking involved in design, albeit with reservations â e.g. the difficulty of allowing due consideration for what is unthinkable and indescribable in this context