The sceptic, if he or she does his or her job correctly, is critical to the productive evolution of any movement, and as we embark on the Building Information Modeling (BIM) revolution, it is worth asking a few questions. We embrace the promise of BIM– born from the notion of collaboration between disciplines and the integration of design– and recognize it as a paradigm shift in an industry that has spent too much of the past century trying to separate consultants on the same design team, to clarify liability and to shed responsibility.