Our little subsection on biology and genetics has covered the core points I wanted to mention, so now we take a sharp left turn and head back to an application of systems theory. Specifically, the next couple of posts will deal with the philosophy’s classic mind-body problem. If you haven’t already, I suggest you skim through my systems-theory posts, in particular “Reality as a System“. They really set the stage for what’s coming here.
As suggested in my last systems-theory post, if we view reality as a system then we can draw some interesting information-theoretic conclusions about our brains. Specifically, our brains must be seen as open (i.e. not closed), recursively modelling subsystems of reality.
Simply by being part of reality it must be a subsystem therein. Because it interacts with other parts of reality, it is open, not closed. The claim that it provides a recursive model of (part of) reality is perhaps less obvious, but should still be intuitive on reflection. When we imagine what it would be like to make some decision, what else is our brain doing but simulating that part of reality. Obviously it is not simulating the actual underlying reality (atoms or molecules or whatever) but it is simulating some relevant abstraction of that.
In fact, I will argue later that this is effectively all our brains do: they recursively model an abstraction of reality. But this is obviously a more contentious claim, so I will leave it for another day.