[deleted]
Vladimir
"that not only is our knowledge of Reality relative and uncertain, but that Reality itself is relative and uncertain"
While I am not sure this is "unstated", this is the problem with physics. It is functioning on a misconception as to how physical existence occurs. In the simplest of terms, this 'new order' involves the presumption of some form of indefiniteness in physical existence. Which cannot be so, otherwise there would not be existence, and difference. That contradiction is then rationalised by increasingly bizarre means, all of which do not correspond with reality. The 'old order' was never followed through to its logical conclusion. Had that happened then it would have revealed the state which the 'new order' thinks it is addressing, but without the incorrect presumption of indefiniteness. One of these rationalisations being, for example, the role of the observer. The problem with this being that what occurred has already happened, and indeed the observer does not interact with what has happened anyway. So either way, the notion that the observer, or the subsequent processing, can have an effect on the physical circumstance is nonsense.
"Information is an artifact of human thought imposed on Nature to describe some of its aspects"
Not so, or at least it should not be so. Valid information must be representational of something else. I have noticed a theme in these essays whereby everything is being deemed as information, because it informs us. But this is a meaningless definition, since all we have is knowledge. Furthermore, to be valid, and one presumes we are not concerned with invalid information, it must not be "imposed", but correspond with, albeit that could be at a higher level of conceptualisation than that at which reality occurs.
However, you are correct in stating that there are real difficulties in compiling knowledge of, and effecting experimentation on, physical existence at the existential level. But this has nothing to do with the "philosophy of knowing". It is a function of the physics of knowing.
We know by virtue of the fact that we (and all sentient organisms, including an alien if he/she visited us) receive physical input. What is physically existent (which includes us) is so, independently of the mechanisms whereby awareness of it is enabled. This includes hypothesis, because to be valid that must adhere to the rules of sensing, otherwise it is just belief. In other words, hypothesis is effectively virtual sensing, it is what could have been directly sensed had it been possible to do so. What this means is that physical existence is all that is potentially knowable to us, and that is underpinned by a physical process.
So we are trapped in an existentially closed system. That is, whilst we can only know what is within this, at least it is knowable. So your comment about "best guesses" is not correct. That only pertains with reference to all possibilities, but we can never know any other possibility. What we are doing is compiling knowledge by comparing knowledge with knowledge, and deeming as valid that which best corresponds with existence as knowable to us at that time (assuming of course valid presumptions and adherence to due process). Now, because we are within a closed system, ultimately we can reach a point where that knowledge can be deemed to be the equivalent of physical existence, ie the caveat of 'at this time' can be dropped. We will be aware of this by default, since after sufficient time no new knowledge arises. This is because there is no extrinsic reference available to judge validity.
The practical problems (the equivalent of your Cloud of Unknowing) revolve around the sheer complexity and scale of physical existence at the existential level. Apart from conceiving properly how physical existence occurs (which is a good start!), there is no way in which experimentation is capable of differentiating separate physically existent states. A reality being the physically existent state of whatever comprises it at a given time. Apart from the vanishingly small scales involved, we are, as you say in the Intro, only receiving a representation of it anyway. So we now have the difficulty of unravelling precisely what was received, which was existent of itself whilst being a representation of what occurred, then discerning any physical influence that could have been exerted whilst it was travelling, then understanding the precise nature of the interaction which resulted in it, which thereby reveals what occurred.
Paul