risk and complex systems

yesterday I was in the Judge Business School whch is the only place in Cambridge that everyone sounds preppy (or like they went to british public school) - there was this workshop on complex systems and catastrophes - not bad...the building reminds me
of the library in the film of Umberto Eco's

T h e N a m e o f t h e R o w s
h
e
N
a
m
e
o
f
t
h
e
c
o
l
u
m
n

Ionic, or ironic? I don't know.

Anyhow, I decided the difference between complicated and complex
was best expressed By Donald Rumsfeld -
complicated is
known unknowns
but
complex is
unknown unknowns

easy, right?