Reciprocity Whenever human activities incorporate machines or rigidly prescribed procedures, the modes of human interaction change. In general, technical arrangements reduce or eliminate reciprocity. Reciprocity is some manner of interactive give and take, a genuine communication among interacting parties. Ursula M. Franklin, The Real World of Technology reciprocity
Head and hand The blueprint signaled a decisive disconnection between head and hand in design: the idea of a thing made complete in conception before it is constructed. Richard Sennett, The Craftsman The preliminary sketch design