Nonetheless, his book is a valuable contribution to the debate, because it gives those with experience an abstract architectural plan against which to evaluate today's imperfect reality of criminal justice.
The book was written exclusively by lawyers.  
mnli hypothesis: The book was written exclusively by lawyers.   premise: Nonetheless, his book is a valuable contribution to the debate, because it gives those with experience an abstract architectural plan against which to evaluate today's imperfect reality of criminal justice.