still going backwards,
Tom Erickson paper for DIS 2000 Lingua Francas for Design: Sacred Places and Pattern Languages "A central challenge in interaction design has to do with its diversity. Designers, engineers, managers, marketers, researchers and users all
have important contributions to make to the design process. But at the same time they lack shared concepts, experiences and
perspectives. How is the process of design-which requires communication, negotiation and compromise-to effectively proceed in the
absence of a common ground?"

must check out what happens at the drs's common ground
or you might prefer common ground

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