“The concepts 'system', 'apparatus', 'environment', immediately imply an artificial division of the world, and an intention to neglect, or take only schematic account of, the interaction across the split. The notions of 'microscopic' and 'macroscopic' defy precise definition. So also do the notions of 'reversible' and 'irreversible'. Einstein said that it is theory which decides what is 'observable'. I think he was right - 'observation' is a complicated and theory-laden business. Then that notion should not appear in the formulation of fundamental theory. Information? Whose information? Information about what? On this list of bad words from good books, the worst of all is 'measurement.”

— John S. Bell

It must have a section to itself.
Against 'measurement' (1990)

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John S. Bell 19

Northern Irish physicist 1928–1990

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Heinz von Foerster (1911–2002) Austrian American scientist and cybernetician

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Source: The structure of social action (1937), p. 8

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“Two features of QT are commonly taken to be fundamentally non-classical: the absolute randomness of single events in the atomic regime, and the need for a permanent record of the experiment obtained using a macroscopic experimental arrangement…QT can also be applied to the larger system consisting of the original atomic system plus the macroscopic experimental arrangement. In this case, however, the larger system needs to interact with another stage of macroscopic recording. Since this procedure can continue ad infinitum, and is decisively terminated only when the result of an experiment is interpreted by a conscious observer, some noted quantum theorists have promoted the view that the quantum theory has some nexus with the consciousness of the observer…”

Ravi Gomatam (1950) Indian academic

Ravi Gomatam's paper "How do Classical and Quantum Probabilities Differ?" http://www.bvinst.edu/gomatam1/pub-2011-01.pdf, delivered at the conference on Foundations of Probabilities and Physics - 6 (FPP-6), Vaxjo, Sweden, June 13-17, 2011.

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“The advantages of models are, on one hand, that they force us to present a "complete" theory by which I mean a theory taking into account all relevant phenomena and relations and, on the other hand, the confrontation with observation, that is, reality.”

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"The Use of Models: Experience," 1969

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