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
What the problem is Sometimes the problem is to discover what the problem is. Gordon Clegg, The Design of Design (Cambridge Engineering Series) The heart of systems engineeringComplete and consistent requirements problemsdesignux