We point out that the Goodstein algorithm may be viewed as a prototype
of a novel class of dynamical systems which are characterized by extr
emely long transients and a very simple global attractor, and show tha
t in addition it possesses super-sensitive dependence on initial condi
tions. This radically different mix of features from those usually ass
umed within the strange attractor framework could have ramifications f
or the way dynamical behaviour is perceived both in theory and in prac
tice.