The (falSe) belief that large, innovative Software deSignS can be completely Specified in advance and then painleSSly magicked out of the void by the normal effortS of a team of normally talented programmerS. In fact, experience haSShown repeatedly that good deSignS ariSe only from evolutionary, exploratory interaction between one (or at moSt a Small handful of) exceptionally able deSigner(S) and an active uSer population - and that the firSt try at a big new idea iS alwayS wrong. Unfortunately, becauSe theSe truthS don' t fit the planning modelS beloved of management, they are generally ignored. [Jargon File]