Limitations of coding

As you know, I am very much interested in our project
of designing computing protocols to assemble and revise
medical diagnosis and/or procedure codes; and I look
forward to going ahead with the project.
At the same time, I think we should give some thought
to the limitations which psychological, social, economic
and legal constraints place on the encoding procedure.

1. The utility of ambiguity, not only as a veil for
   ignorance, but as an appropriate expression
   for issues that are undecidable.
   either because available terms  
   does not adequately reflect experience;
   or because experience is inadequate to permit
   the selection of appropriate terms.

2. The effect of habit 
   The mere fact that one has said something once
   predisposes one to use it again.
   Repetition appears to validate the original judgment.
   Alteration appears to impugn it. 

3. The effect of convention 
   requires no elaboration

4. The effect of legal implicit threats 
5. The effect of economic incentive
6. The effect of conceptual formulas on experience
7. Conforming the diagnosis to what iss
   diagnostically and therapeutically practicable
8. The effect on veracity and reliability
   of using the (encoded) medical record as a disciplinary tool.