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To: LLCF who wrote (11583)	5/18/2006 10:25:15 PM
From: TheSlowLane	Read Replies (2) \| Respond to of 78413

extremely powerful emergent phenomena That reminds of a night in the cardboard box under the freeway, after Tom, Wayne and I had loaded up on sterno and baked beans. But...I digress...

To: LLCF who wrote (11583)	5/19/2006 10:29:26 AM
From: LoneClone	Read Replies (1) \| Respond to of 78413

Emergent Phenomena and Complexity Vince Darley Division of Applied Sciences Harvard University 33 Oxford Street, Cambridge MA 02138 e-mail: vince@das.harvard.edu 15th March, 1994 Abstract: I seek to define rigorously the concept of an emergent phenomenon in a complex system, together with its implications for explanation, understanding and prediction in such systems. I argue that in a certain fundamental sense, emergent systems are those in which even perfect knowledge and understanding may give us no predictive information. In them the optimal means of prediction is simulation. I investigate the consequences of this for certain decidability and complexity issues, and then explain why these limitations do not preclude all means of doing interesting science in such systems. I touch upon some recent incorporation of this work into the investigation of self-organised criticalities. santafe.edu ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

To: LLCF who wrote (11583)	5/19/2006 10:30:35 AM
From: LoneClone	Read Replies (2) \| Respond to of 78413

Consciousness and mind as emergent phenomena or emergent properties of the brain. home.btclick.com -------------------------------------------------------------------------------- Abstract: The mind cannot be an emergent property of the brain or any other physical system, since emergent properties and emergent phenomena are psychological in origin, and require the pre-existence of an observer's mind in order to become manifest. -------------------------------------------------------------------------------- Emergent properties and emergent phenomena A frequently used materialist argument against the existence of the mind as a non-physical continuum is to claim that it is an 'emergent property' or 'emergent phenomenon' of the brain. The definition of emergence given in the Dictionary of Philosophy of Mind is emergence- Properties of a complex physical system are emergent just in case they are neither (i) properties had by any parts of the system taken in isolation nor (ii) resultant of a mere summation of properties of parts of the system. Thus a boat which drifts northwestwards in response to a southerly wind and a current flowing from the east is not exhibiting emergent behavior, whereas the products of chemical reactions could be considered emergent. To quote the Dictionary of Philosophy of Mind: "Consider the following chemical process: CH4 + 2O2 --> CO2 + 2H2O (Methane + oxygen produces carbon dioxide + water). For Mill, the products of such chemical reactions are not, in any sense, the sum of the effects of each reactant. While the mechanics underlying chemical reactions are understood well enough today to render Mill's point dubious, we can see why the above chemical reaction would impress Mill and his contemporaries as significantly different in kind from the Composition of Forces for moving bodies. In the case of the chemical reaction, the resulting compounds exhibit properties significantly different from those of the reactants. For instance, methane is violently combustible, whereas carbon dioxide and water are not. This contrasts sharply against the case of a north-westerly moving object being propelled by two forces--one towards the north, the other towards the west--insofar as the subsequent motion is so obviously decomposable into the effects of the conjoint causes. A very live possibility to consider in connection with these examples is that an enhanced understanding of the processes that underlie some observed property of a system may show that system not to be an example of emergence. That is, an increase of knowledge about the way certain effects are obtained may reveal that certain effects are decomposable into the effects contributed by subcomponents of that system. Mill's chemical examples fail as properly emergent for just this reason. With the development of quantum mechanical explanation, we have been able to see how chemical reactions are composed of additive properties of individual electrons (McLaughlin, 1992, p.89)." Note that in the case of a chemical reaction, the attribution of emergence differs according to the extent of knowledge of the observers (19th century bucket chemists versus 20th century quantum physicists). Nevertheless, it is still commonplace to think of certain phenomena, such as biological systems, as as showing complex behavior which somehow emerges uncreated out of far simpler behaviors such as the chemistry of carbon compounds. The Game of Life as an emergent phenomenon. One of the most familiar examples of emergent behavior is exhibited by cellular automata, such John Conway's Game of Life and its variants (eg Brian's Brain). These are available as animations on the web: math.com bitstorm.org argilo.net el.www.media.mit.edu The Game is what a computer programmer would nowadays define as an object, which consists of a datastructure (the two dimensional pixel array) and associated algorithms (the rules which determine whether pixels switch on or off according to the state of their neighbors). The algorithms are extremely simple: A dead cell with exactly three live neighbors becomes a live cell (birth). A live cell with two or three live neighbors stays alive (survival). In all other cases, a cell dies or remains dead (overcrowding or loneliness). Amazingly, out of these simple rules operating on a simple datastructure, a complex system of gliders, oscillators etc appears. But is this really an emergent phenomenon? If the gliders were to emerge out of the screen and glide around the top of our desk (as distinct from being pixel patterns gliding around our PC desktop), then we should have to concede that something had emerged. But all we can say is that an appearance has emerged. So, from where has the appearance emerged? If we search carefully, we come to the conclusion that we cannot find the complex behavior within the object. The movements of the pixel-structures are algorithmically compressible, with no remainder, back into the rules that generated them. There is no mysterious addition of procedural complexity. The two-dimensional pixel array remains an array of pixels in two dimensions - it hasn't suddenly changed its nature and become a cube or magically sprouted chess-pieces. Yet we can't deny that we have observed a phenomenon which has properties which 'look different' and 'feel different' from its constituents. But if the phenomenon hasn't emerged from the object, then the only other place from which it could have emerged is the mind of the observer. We are therefore left with the conclusion that emergence is a psychological, not a physical phenomenon. The pixel array is 'nothing but' sequentially illuminated squares on the computer screen. All else is imputed by mind. David Chalmers makes a similar point in his notes on emergence , quote: "The notion of reduction is intimately tied to the ease of understanding one level in terms of another. Emergent properties are usually properties that are more easily understood in their own right than in terms of properties at a lower level. This suggests an important observation: Emergence is a psychological property. It is not a metaphysical absolute. Properties are classed as "emergent" based at least in part on (1) the interestingness to a given observer of the high-level property at hand; and (2) the difficulty of an observer's deducing the high-level property from low-level properties" So we can dismiss all claims that consciousness, mind and awareness are emergent properties of matter or brains, because we need the presence of a mind for emergent properties and phenomena to appear in the first place. The subjective activity of the mind of the observer, together with the 'objective' procedures and the structures upon which they operate, is an irreducible component of emergent phenomena. The behavior of cellular automata gives a vivid illustration of the three levels of dependent relationship, as discussed in the article on sunyata : (1) Gross dependent relationship - the dependence of phenomena on their causes (the algorithms or rules of production). (2) Subtle dependent relationship - the dependence of phenomena on their perceived parts (the pixels which go to make up the emergent structures). (3) Very subtle dependent relationship - the dependence of phenomena on imputation by mind. Emergent all the way up and all the way down? In addition, the article on sunyata demonstrates that instead of viewing the world in terms of 'things', we should understand all phenomena in terms of three types of relationships - causal, organisational and imputational. The universe consists of relationships and only relationships. To ask what the participants in these relationships are in themselves only leads to paradox. One interesting aspect of emergent phenomena is the different causal and organisational relationships which appear at different levels of investigation. For example, ecology emerges out of biology, which emerges out of chemistry, which emerges out of physics, which emerges out of mathematics, which emerges out of the mind contemplating the empty set. Each level of investigation has its own explanatory relationships, yet if we check carefully there is no 'added extra' coming from the side of the objects. (Everything is algorithmically compressible without remainder, there are no mysterious ingredients added as we progress from lower levels to higher levels). The only place from which these relationships/phenomena can emerge is the mind. Hence we are again forced to conclude that these emergent phenomena are psychological phenomena. So, even the relationships themselves are imputed by mind and have the nature of mind. - Sean Robsville home.btclick.com