Lawyers never act as principals. They have carved out a niche in the field of AGENCY. For myself I state that I never deal with agents. Just as in the movie MATRIX when you encounter an agent RUNNNNNN!! And normal people might be converted to an AGENT in the wink of an eye.
[A] x [A] -1 = 1
You don't want to pay attention to [A]. Figure out [A] -1. The "1" is the IDENTITY matrix. If you have no identity then you have lost "the ONE".