If the quanta spoken of in the physical sciences are physically existent, they cannot be mere vacua acting on other vacua. Merely saying that they are statistically full of vacua-type quanta does not solve anything. If they are non-existent, they cannot act at all. Hence, there is no question even of the correlation between two sorts of processes and then if we somehow insert into it all the quantum-mechanical articulations in terms of statistical measurements (1) of existent causes or non-causes, (2) mere articulations of our statistical recognition of some BEHAVIOUR, etc.
In all of these, how can we now speak of the existence of things -- however minute, near-infinitesimal, even in the case of the quanta of energy? If they are physically existent -- and not merely capable of being spoken of --, then quantum-physical definitions of statistical causality, the notorious consciousness-dependence of the existent quantum world, etc. can be avoided by some new ways of re-interpreting statistical causality.
Something weird for some physicists would be this: If the photons are not merely a statistical or merely mathematically existent affair in STR, GTR, QFT, quantum cosmology, etc., they must be existing non-vacuously. How can a non-vacuous and non-infinitesimal photon be made to travel (1) in some experiments merely as a wave and (2) in some other experiments merely as particle?
Some seem to suggest that consciousness-level brain activities are to be subject to a quantum biology. But if photons and any other sort of quanta (say, of neutrinos) are not vacuous and hence Extended, they too should have parts, these parts too should have some sort of Change, etc., ad libitum. Why then should we limit consciousness-level brain activity to the current level of quantum physics?
Let us conclude by formulating a generally acceptable kernel of what in the very least is meant when we say that something exists. My use of the word ‘electron’ need not mean that any of the models of electron as an existent must as such be the case out-there. This is because the word ‘electron’ is a denotative word constructed linguistically. It denotes a denotable, which exists as whatever it is, without our having to take it to be exactly this way or that way. But there can be at least some physical-ontological guidelines as to how an electron cannot be. For example, it is not a pure vacuum. Let alone the discourse that only quantum vacua exist. This is exactly what I mean, too: a pure vacuum does not contain any existent, not even one quantum of energy. A quantum of energy should be carried by something existent, and not by something vacuous. This quality that it is not a pure vacuum is what I call Extension. Every existent must be in Extension. If extended, it has parts, which are in some Change, too. In short, it is impossible to say that anything termed electron can exist without internal Change, which may be caused externally and/or internally.
Extension and Change are the ways without which nothing can exist. If anything is in Extension-Change-wise existence, this is causal existence: some finite amount of causation happens there. An antecedent changes within itself due to the impact that its parts make and are made to take. It is continuous in the sense that it is continuously the manner of existence of anything, but this is not infinite causation. If anything existent should be such, this shows that all existents are in Causality. This is the pre-scientific Universal Law of Causality. Now clearly, quantum wavicles too should be in causation, if we are speaking of existents, and not of pure vacua.
I suggest that only those who are sure of the existence of the world, in it some biological existents, in them some developed or less developed brains, etc. need to attempt their thoughts here. Others are all blissfully convinced that there are no photons, there are no electrons, there exists only consciousness, etc. They need only to repeat "I am That". We can only envy their spiritual attainments.