@de budding,
de_budding,
So you could say that Identification and definition are fundamental factors as the basis knowledge. I agree. But I think you may want to reconsider the term "aggregate knowledge" as this may encapsulate the fundamental factors of what you are attempting to discern about knowledge.
What is identification but the aggregate predicates of some given thing. For example, if early man pointed to an apple and said "this is something?this is an apple," the cave man points and refers to the fruit from then on by its identifications, i.e. its color which is red, its shape which is round, etc. and not the substrate it may actually be? an apple as an apple in itself. What is definition but an identification of those predicates. These are all aggregates of a thing. But you are right and prudent to want to defer the label itself because it may infer inductive rather than deductive observation.
As to your other possible thesis, that all knowledge originated from the senses, you could take knowledge as a-priori knowledge, but this seems more problematic and not in line with what you may want to accomplish, as a-priori knowledge involves knowledge before senses? unless you affirm a divine or natural program we originate with.
In response to your newspaper article example used to illustrate your thesis. There may be two problems.
In the case of #1, investigating the origins is problematic, though entirely prudent and rational. But if we investigate the author of an article, we would, to uphold the integrity of your method, need to investigate the authors who informed or influenced the author, and investigate those authors, and the author's author's author and so on and so on. This forms some sort of reductio ad absurtium (reduction to absurdity).
In the case of #2, how can we ensure exact truth when what we believe may be false? #2 does not take into consideration the relative nature of truth.
[As a side note, I get the impression that you may be pursuing a metaphysical ontology with knowledge. That makes great sense and I completely agree that is where a possible answer may be found. I have been working for a few years with metaphysical ontology relating to corporate law in pursuing my J.D., and I am convinced that the only answer I can reasonable settle on may rest within the confines of metaphysics. Might I suggest, if you are interested in the origins of knowledge, Aristotle's metaphysics Book Zeta- subbook 1, 2, and 3 (only a few pages long). Though Aristotle talks about "being"(i.e.substance) this can provide you with an excellent template for researching the ontology of knowledge. I did a senior thesis on zeta when I was an undergraduate, and I can email you my translation on the first three chapters if it can help you further your own research.]