By Teoman Sağlam

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This has been explained above in the context of digital computers. It is also the case where effective potentials occur due to local matter structuring [23]. g. transistors connected together in integrated circuits in a computer, or networks of neurons connected by synapses in a brain) that cannot be described in terms of lower level variables. It is the higher level patterns that are the essential causal variable in solid state physics by creating a specific band structure in solids (hence for example the search for materials that will permit high temperature superconductivity).

8, 17–24 (2011) 17. D. Deutsch, The Fabric of Reality (Penguin Books, London, 1998) 18. S. Dodelson, Modern Cosmology (Academic Press, New York, 2003) 19. S. Eddington, The Nature of the Physical World (Cambridge University Press, Cambridge, 1928) 20. R. Ellis, Cosmology and local physics. Int. J. Mod. Phys. A17, 2667–2672 (2002) 21. R. Ellis, Physics, complexity and causality. Nature 435, 743 (2005) 22. R. Ellis, Top down causation and emergence: some comments on mechanisms. J. Roy Soc Interface Focus 2, 126–140 (2012) 23.

Ellis Example 1: Reading How does reading work? Heres a remarkable thing. • You can read this even through words are misspelt, • and this through letters are wrong, • And this through words missing. How can it be we can make sense of garbled text in this way? One might think the brain would come to a grinding halt when confronted with such incomplete or grammatically incorrect text. But the brain does not work in a mechanistic way, first reading the letters, then assembling them into words, then assembling sentences.

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