On Sun, 14 Aug 2011 18:07:32 +0100, Ian Goddard <goddai01@hotmail.co.uk> wrote: >As I keep saying, we're lumbered with a data model which makes no formal >separation between data and conclusion and makes no formal provision for >reasoning. And this is a natural consequence of that. In this case it has nothing to do with the data model. It has to do with software that changes the input data. If I enter data that says that someone was born in Whitehaven, Cumberland, England, and the program changes that to Cumberland, Illinois, United States, then the bug is a lot more elementary than a faulty data model. -- Steve Hayes Web: http://hayesgreene.wordpress.com/ http://hayesgreene.blogspot.com http://groups.yahoo.com/group/afgen/

Steve Hayes wrote: > On Sun, 14 Aug 2011 18:07:32 +0100, Ian Goddard <goddai01@hotmail.co.uk> > wrote: > >> As I keep saying, we're lumbered with a data model which makes no formal >> separation between data and conclusion and makes no formal provision for >> reasoning. And this is a natural consequence of that. > > In this case it has nothing to do with the data model. > > It has to do with software that changes the input data. > > If I enter data that says that someone was born in Whitehaven, Cumberland, > England, and the program changes that to Cumberland, Illinois, United States, > then the bug is a lot more elementary than a faulty data model. A data model which required an audit trail for a statement would at least furnish an explanation of how it got there. -- Ian The Hotmail address is my spam-bin. Real mail address is iang at austonley org uk