Abstract

?Emergence? can be analyzed into evolutionary and developmental kinds. The latter can be further analyzed into intensional and extensional kinds of emergence. Evolutionary emergence occurs each time a uniqueness enters the world. Intensional emergence (supervenience) explicitly involves the categories of an observer. Extensional emergence (cohesion) is constructed as an attempt to see developmental emergence as a result of the imposition of larger scale constraints on a system. In all cases there is a sudden jump from pre?emergent to post?emergent stages so that the transformation may be said to defy continuous description, which is also hampered by the fact that knowledge of properties of the pre?emergent condition alone does not allow us to predict post?emergent properties