Hi Rob,
Thanks for your perceptive comments which challenge me to explain my viewpoint better.
I didn't explain what I meant very well. When I said that causation is a first principle, I meant that when we represent physical information as a law of nature mathematical equation (after years of experimentation) we have already assumed that the interconnections in the equation, including the "=" sign, represent causation in physical reality. This causation assumption is the basis of deterministic explanations of reality.
I think many/most determinists believe that there is a deterministic explanation underlying quantum processes. Determinists seem to deny that, when it comes to living things, the outcomes of quantum processes ("choices") could be a source of non-deterministic information that has any net effect on the system.
I contend that there is nothing external to the universe, there is no Platonic realm. In my essay I contend that law of nature "equations" represent information category relationships, but they do not indicate that computation as we know it is taking place, because there is no evidence for all the machinery/baggage associated with computation.
In my essay, I explain why numbers should be considered to be (in effect hidden) information category self-relationships. I surmise that the input of a new number via quantum decoherence is like adding a new relationship to an existing set of (law of nature) relationships: as numbers derive from relationship, it in effect changes some other numbers in the system (from the point of view of a subject). So I contend that quantum mechanics is driving change in the system, NOT mathematical computations.
So maybe quantum decoherence should be envisioned as the creation of a physical number outcome, rather than the "choice" of a number outcome. In my essay I note that the creation of a new number (i.e. the creation of a new hidden information category self-relationship) is an everyday process that seems to be very much like the creation of a new law of nature (i.e. the creation of a new information category relationship); and that the evolution of complex life requires the continual evolution of new information categories and relationships.
I like the story about Claude Shannon. Complex living things (they are all complex) also require an internal system of "knowledge communication", i.e. they need to utilize molecules as symbols to represent complex information. I contend that this represented "information" doesn't become information until it is apprehended, i.e. until it is subjectively experienced (e.g. by the molecular components of cells etc.).
Cheers,
Lorraine