Emergence and Cellular Automata
Despite its portentous name, emergence seems to be the most natural thing in the world. Everywhere we look we find things which possess properties which their components or constituents lack. Trees are made of leaves, trunk and root, but none of these things are trees in their own right. If anything about the structure of nature seems obvious and irrefutable it is that nature possesses a hierarchical structure within which ‘higher level’ entities have properties lacked by ‘lower level’ entities.