> There is no usefull interpretation of
> 'right' or 'wrong' without a question.  :)

Agree. That was my point a little further on. A number of problems may 
appear similar because the data is presented in the same way and/or they use 
the same variables. Without matching the data structure to the reality model 
you can easily answer the wrong question. Understanding the question is an 
essential part of the problem definition (obviously enough :-) ).


        RM. 

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