# Complex vs Complicated

In the realm of Complexity Science, many people talk about how things are “Complex” but they aren’t “Complicated”. The problem is that the two terms can be hard to distinguish.

In order to begin to understand complexity, we need to discover what complexity is not. Complexity is the region between the polar opposites, Determinate and Probabilistic. Something determinate can be predicted with certainty. Something probabilistic can be predicted within some statistical bounds (like the flipping of a coin). While complexity includes elements of both of these, it is neither determinate nor probabilistic.