over Somalia - kinda like his quible with me over RSA (and I can see his point in both cases), the real issue as Wilf succinctly put it and JMM reiterated in his lawerese , why do you want to differentiate? what is your purpose? If it is purely academic, then you might need an operational definition which can pretty much be what you want it to be (so long as it doesn't do too much violence to the general understanding of the term a la Webster),

Cheers

JohnT