“If a model itself is “a poor representation of reality,” they write, “determining the sensitivity of an individual parameter in the model is a meaningless pursuit.””

— Orrin H. Pilkey

Cornelia Dean, " The Problems in Modeling Nature, With Its Unruly Natural Tendencies http://www.nytimes.com/2007/02/20/science/20book.html?_r=1&em&ex=1172034000&en=66b1bbb4657b7f9d&ei=5087%0A&oref=slogin", The New York Times (February 20, 2007). <br class="br">Useless Arithmetic: Why Environmental Scientists Can’t Predict the Future (2007)

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Orrin H. Pilkey4

American ecologist 1934

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“Scientific models have all these connotations. They are representations of states, objects, and events. They are idealized in the sense that they are less complicated than reality and hence easier to use for research purposes. These models are easier to manipulate and "carry" than the real thing. The simplicity of models, compared with reality, lies in the fact that only the relevant properties of reality are represented.”

Russell L. Ackoff (1919–2009) Scientist

Source: 1960s, Scientific method: optimizing applied research decisions, 1962, p. 108 as cited in: Joe H. Ward, Earl Jennings (1973) Introduction to linear models. p. 4.

“The usefulness of the models in constructing a testable theory of the process is severely limited by the quickly increasing number of parameters which must be estimated in order to compare the predictions of the models with empirical results.”

Anatol Rapoport (1911–2007) Russian-born American mathematical psychologist

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“The construction of an economic model, or of any model or theory for that matter (or the writing of a novel, a short story, or a play) consists of snatching from the enormous and complex mass of facts called reality, a few simple, easily-managed key points which, when put together in some cunning way, become for certain purposes a substitute for reality itself.”

Evsey Domar (1914–1997) American economist

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“The word model is used as a noun, adjective, and verb, and in each instance it has a slightly different connotation. As a noun "model" is a representation in the sense in which an architect constructs a small-scale model of a building or a physicist a large-scale model of an atom. As an adjective "model" implies a degree or perfection or idealization, as in reference to a model home, a model student, or a model husband. As a verb "to model" means to demonstrate, to reveal, to show what a thing is like.”

Russell L. Ackoff (1919–2009) Scientist

Source: 1960s, Scientific method: optimizing applied research decisions, 1962, p. 108 as cited in: Charles West Churchman, Richard O. Mason (1976) World modeling: a dialogue. p. 23.

“Knowledge is encoded in models. Models are synthetic sets of rules, and pictures, and algorithms providing us with useful representations of the world of our perceptions and of their patterns.”

Didier Sornette (1957) French scientist

Source: Why Stock Markets Crash - Critical Events in Complex Systems (2003), Chapter 5, Modeling Financial Bubbles And Market Crashes, p. 134.

“Logic is a poor model of cause and effect.”

Gregory Bateson (1904–1980) English anthropologist, social scientist, linguist, visual anthropologist, semiotician and cyberneticist

Source: Mind and Nature: A Necessary Unity, 1979, Chapter 2, section 13 as cited in: Gregory Bateson (1988) Mind and nature: a necessary unity. p. 134

“The Nordic welfare model is in many aspects a good model but it needs more of a choice for individuals.”

Fredrik Reinfeldt (1965) 32nd Prime Minister of Sweden

ibid

“Reference models can be quite comprehensive, consisting of hundreds or thousands of model objects. This is why various levels of aggregation are used. Reference models provide enterprises with an initial process engineering solution, letting them determine the degree of detail of the model and the business content.”

August-Wilhelm Scheer (1941) German business theorist

Source: ARIS architecture and reference models for business process management (2000), p. 380.

“You never change things by fighting the existing reality. To change something, build a new model that makes the existing model obsolete.”

Buckminster Fuller (1895–1983) American architect, systems theorist, author, designer, inventor and futurist

As quoted in Beyond Civilization : Humanity's Next Great Adventure (1999), by Daniel Quinn, p. 137
From 1980s onwards

“The problem is that there is no alternative to models. We all think in simplified models, all the time. The sophisticated thing to do is not to pretend to stop, but to be self-conscious — to be aware that your models are maps rather than reality.”

Paul Krugman (1953) American economist

Source: Development, Geography, and Economic Theory (1995), Ch. 3. Models and Metaphors

“If a model itself is “a poor representation of reality,” they write, “determining the sensitivity of an individual parameter in the model is a meaningless pursuit.””

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Orrin H. Pilkey4

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