Leonardo Da Vinci made distinctions in writings between that which is natural and that which is mathematical. He considered the sensory or experience in general as primary in terms of coming to truths about the world.
Where, when he tends to reference the mathematical, he leans to speaking of the nothing, as compared to the something, which, presumably, would comprise the sensory or that given by sensory experience. His mathematics reflected the productions in nature.
His science reflected the direct construction of the experience, where the mathematical and the scientific meet one another is in the mind of Da Vinci. To be born or birthed here is neither science nor mathematics, but a form and relation of general knowledge; something of looking for the self-consistencies in nature and in mind with the mind as part of the whole, as in everything connected as one, including the human being and its mind.
That which is in mind constrained by those limits set forth from experience or if the rules and contents of the in mind are broken in some manner; then, these enter into the realm of the impossible, as the natural becomes constrained by the existent and the mathematical by nothing. Yet, both function by principles.
When looking at self-consistency in nature, this amounts to a search for the logical in nature to an extent; while, in search of the self-consistencies of nature at the same time, we come to search for the processes of nature.
In mind, too, one, as in the mathematical principles of reasoning in the mind of Da Vinci, looks for the principles of self-consistency in the mind’s eye, as in the examination of the contents of the mind with the contents of the mind itself.
In this, we find recursion, fractionation of content fit for ease of problem-solving, fit into the mind as a means of self-knowledge, as in knowing that one exists or knowing that one knows through knowing oneself as capable of knowing in the first place.
The knowledge comes simultaneously with the knowledge of knowing; it’s as if the knowledge of knowing one can know is the first form of knowledge with the knowledge of self-existence, of one’s soul in the world.
Either in the state of nature or in the status of the mind, the contents of both bring about self-consistency as a consistent reflection one upon the other, and the mirror of one to the other as showing the truths garnered from this relationship of the nothing of that which is in the mind and the something of that which is gathered from the world.
To Da Vinci, experience was primary and reflected the real, while the mind merely existed as a canvas reflecting the unreal — the something in contrast to the nothing. A nothing capable of representation of something only because a something exists in the first place and comes to mind with the senses for representation in the mind.
These reflections of self-consistency in either reflects a larger consistency in the nature of Nature of the nature of human nature via-a-vis the human mind, as in both contained in one and the same world, Nature, by Necessity.
The coterminous existence in Nature reflects individuated principles of self-consistency differentiable while part of the same self-consistency structure and dynamic components of the same processes.
These processes reflected in the necessary; the necessary exhibited in Nature, and seen so far as to exist in the mind as part of human nature. Functional or operational truths about the world and the mind, as in an Operationalism with self-consistency.
The ways in which things work in nature as derived from the senses, from experience, and the ways in which the mind represents, and so functions, to provide different facets of the self-consistent and the operational.