Consider that classification systems rely on logic to be affective, so the answer is yes all classification systems have to be scientific.--[[User:Tims|TimS]] 12:59, 8 April 2007 (EDT) | Consider that classification systems rely on logic to be affective, so the answer is yes all classification systems have to be scientific.--[[User:Tims|TimS]] 12:59, 8 April 2007 (EDT) |