“…a complicated system is defined by a finite and bounded (unchanging) set of possible dynamic states, while a complex system is defined by an infinite and unbounded (growing, evolving) set of possible dynamic states.

[…]

Many complicated problems have been solved by human beings and by our powerful computing tools. But I think this creates the expectation that we can solve complex problems as well. By understanding the difference between complication and complexity, we can take a more realistic view.”