Computational Modeling Fall 2008 For today, you should: 1) work on Chapter 8, aim to finish today 2) read about emergence 3) take a swappy book, or the book you bought, on the plane Today: 1) work on Chapter 8 2) discussion of emergence For next time you should: 1) read Chapter 9 (my suggestions next time) 2) prepare for a quiz on Chapter 8 Emergence --------- From the Wikipedia page on Emergence, Corning's refinement of Golding's definition: "The common characteristics are: (1) radical novelty (features not previously observed in systems); (2) coherence or correlation (meaning integrated wholes that maintain themselves over some period of time); (3) A global or macro "level" (i.e. there is some property of "wholeness"); (4) it is the product of a dynamical process (it evolves); and (5) it is "ostensive" - it can be perceived. For good measure, Goldstein throws in supervenience -- downward causation." Some terms that tend to get thrown around in definitions of emergence: Surprise, novelty, causation, (un)predictability, intent, self-organization, evolution (increasing order), new category. For help thinking about causation across levels, I recommend Hofstadter's "I Am a Strange Loop".