The Solvay conference of marked the birth of quantum the ory This theory constitutes a radical break with prior tradition in physics because it avers if taken seriously that nature is built not out of matter but out of knowings However the founders of the theory stipulated cautiously that the theory was not to be taken seriously in this sense as a description of nature herself but was to be construed as merely a way of computing expectations about future knowings (...) on the basis of information provided by past knowings There have been many e orts over the intervening seventy years to rid physics of this contamination of matter by mind But I use the reports at this Sym posium to support the claim that these decontamination e orts have failed and that because of recent developments pertaining to causal ity the time has come to take quantum theory seriously to take it as the basis for a conception of the universe built on knowings and other things of the same kind Quantum theory ensures that this con ception will yield all the empirical regularities that had formerly been thought to arise from the properties of matter together with all of those more recently discovered regularities that cannot be understood in that mechanical way Thus I propose to break away from the cau tious stance of the founders of quantum theory and build a theory of.. (shrink)

In response to recent suggestions that the phenomena of consciousness may be related to those described by quantum theory, it is argued that distinctive features of brain activity are more typical of nonlinear classical dynamics than of quantum dynamics, which is a linear theory. Thus natural scientists should turn to hierarchies of nonlinear classical systems rather than quantum theory for explanations of the brain's mysterious behaviour.

Physical scientists were driven during the late twenties to abandon a fundamental idea that had reigned since the time of Issac Newton To obtain a rationally coherent and practically useful theory of all physical phenomena they turned to a pragmatic approach The core idea was that the basic physical theory was no longer directly about a physical world that was conceived to exists apart from anyone s knowledge of it Rather the theory was regarded as being directly about certain of (...) our knowings This switch appears to be exactly what is needed to establish a rationally coherent theoretical foundation for the science of consciousness For it converts the immediate objects of psychological and physical theories into things of the same kind namely human experiencings rather than things of disparate kinds separated by an unbridgable conceptual gap Within this pragmatic quantum approach certain particular aspects of human brain structure entail the existence of macroscopic quantum e ects that are linked to our conscious experiences Moreover our conscious thoughts have causal e ects that can both enhance our prospects of survival and work e ectively against thermal noise in the creation of the brain states that guide our behaviour.. (shrink)