A casual inspection of sense data theory suggests that the IMPD problem is not central, nor perhaps even considered. Does any one ask why sense datum have the secondary properties they do?
Dualism will not survive on quantum-mechanical tricks (Popper –Eccles), little miracles going on inside our heads against an informative theory of network function. Network operation is the key problem, especially the problem of syntactic (timed, structured, sequenced, controlled) behavior. The problem with the single photon response example is that in order to get this sensitivity, a whole lot of other things have to be going on, everything else has to be shut down or inhibited. Banging on a single receptor on a single neuron won’t do it, this selectivity, concentration, focus, whatever has to be generated by a whole lot of other activity. Focus or sensitivity has to be dialed in, that’s the problem, the system is too sensitive and has to be globally inhibited, that’s why we have GABA all over the place.
If a sufficient amount of GABA is lacking, however, the system goes out of whack, and tens of thousands of neurons send messages rapidly, intensely and simultaneously, resulting in a seizure. http://www.sfn.org/index.cfm?pagename=brainBriefings_epilepsyAndGABA
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