Re: Table Design for Hierarchical Data - Mailing list pgsql-sql

Leif Biberg Kristensen wrote:
> On Monday 12. April 2010 16.57.38 Rob Sargent wrote:
>   
>> Believe me: "ego-ma-pa" will correctly define genealogical relationships
>> (at least among humans).
>>     
>
> Yes, but a family tree is not a hierarchical tree as defined in database 
> theory. Believe me: I'm a genealogist.
>   
The last sentence is almost like the 'proof by authority' from 36 
methods of mathematical proof, see e.g. 
http://jwilson.coe.uga.edu/EMT668/EMAT6680.F99/Challen/proof/proof.html.