We introduced the xenosubstance (XS) as being an unstructured, perfect continuous substance. But so is vacuum (V). It is clear that we need to add additional properties of characterization for xenosubstance if we hope to advance further and, it is also clear that ultimately xenosubstance is nothing more nor less than the reincarnation of the old and troubled concept --the æther, the prevailing substance that was assumed to occupy the entire cosmic space of the Universe. That such a substance must exist was indisputable for centuries as the necessary medium for propagation of all material perturbances. To abolish the existence of a material medium prevailing throughout the space of the Universe and substitute it with vacuum (as it is done in Einstein's Theory of Special Relativity and in the subsequent so-called "modern" Physics) is an absurdity of truly "cosmic" proportion as no material perturbation could possibly travel through vacuum.

Isaac Newton reflecting upon this very subject noted, in no uncertain terms, the tremendous absurdity of considering vacuum as the prevailing entity filling up the space of the Universe. In his letter to his friend Richard Bentley, Newton wrote:

"... that one body may act upon another at a distance through a vacuum, without the mediation of any thing else, by and through which their action and force may be conveyed from one to another, is to me so great an absurdity, that I believe no man, who has in philosophical matters a competent faculty of thinking, can ever fall into it." [Isaac Newton's Principia, vol. II, University of California Press, 1966, p. 634].

Now, that we re-introduced the æther substance through a new name --the xenosubstance (XS), let us define this xenosubstance through its intrinsic properties of characterization:

I. First, we shall assume that XS is a perfect continuous elastic substance (within the meaning of Continuum Mechanics) which, when unconstrained, is assumed to reside at its lowest possible density, say . We call this natural state of existence XS its xenobase state (XB).

.	.	We introduced the primeval admixture of Nature as being made of xenosubstance (XS) and vacuum (V). Now with the recognition that the natural state of existence of XS is xenobase (XB), it follows that the primeval admixture of Nature is made of xenobase (XB) and vacuum (V).
This bottom-line admixture (of xenobase and vacuum) must act as the primeval "base" of Nature and, as such, that base must reflect an inner unity through an existing intrinsic bond between them. We call that bond, the xenobasebond. We express this intrinsic bond or alliance of the primeval admixture of Nature through
.		The Third Fundamental Principle of Nature: In Nature, xenobase and vacuum are integrated into one non-stretchable foundation that cannot be pulled apart.
	REMARK-1: The Third Fundamental Principle of Nature states that there is a fundamental alliance at the base-level of Nature that cannot be broken or separated one from another.
	REMARK-2: In simple terms, the xenobasebond propriety of XB states that a XB-block in the vacuum space cannot be pulled out from that space as --by the xenobasebond property-- the XB-block cannot be separated from its vacuum environment.

Now that we have recognized through The Third Fundamental Principle of Nature, of the indestructible bond that exists between xenobase (XB) and vacuum (V), we need to see what are their respective proprieties of characterizations and as such, let us begin with this line of exploration.

We will consider the XB state to be characterized by these properties:

1. XB (i.e., XS in the XB state) opposes no resistance towards compression. We call this the non-compress resistivity property.

2. XB (i.e., XS in the XB state), up to a finite upper limit, will resist to be stretched or decompressed. We call this the non-stretch property of XB.

The xenobase critical resist force  is the maximum stretching force that can be applied on XB without being broken apart. When XB is being pulled apart (in an attempt to be stretched), the energy of the pull is being transmitted into the XB state transforming XB state into a tensioned XB (tXB) state. Unlike a normal XB (nXB) state, a tensioned XB (tXB) state will oppose resistance towards compression, the "power" of this ressistance being equal (but opposite) to the force of the pull. As soon as the force of the pull is being removed, the tensioned XB state (by having no mechanism of keeping its acquired tensional energy) transforms back into its normal XB (nXB) state since, as stated, the XB state has no capacity of keeping the infused energy transmitted through the pull.

REMARK: Towards compression, XB behave exactly as a perfectly elastic body. On the other hand, towards decompression XB acts as an absolute rigid object. .2-a) This remarkable dual diametral opposite behaviour and property of characterization of XB is called the xenobase flip property of XB. .2-b) The ability of the XB-state to completely be flexible towards compression and be absolute inflexible towards decompression is called the uniflex property of XB.

 II. XB, through a body-force of compression or squeeze, by being infused with compressional energy (derived from the squeezing force) and, by being a perfect elastic medium, will transform into a "condensed" state called the xenofluid state (XF) that is characterized by these properties:

1. XF, by not having an inner "mechanism" of keeping or storing the acquired compressional energy, will have the natural tendency of releasing its acquired energy and transforming back to its original XB state of existence. We call this natural property of XF its xenormalization property. The force and the field emanated through the xenormalization property is called the xenoexpand force F_E  and xenoexpand background field , respectively and the law expressing the xenormalization property of XF is called the DownState Law (DSL). In essence, this law states that the xenoexpand force F_E is proportional to the density of XF that was acquired from the compression of XB, the greater the density the greater the magnitude of this force (being zero at the XB state). We can write this as follows:

FE =K (-) with >

with K being an universal constant called primary universal constant (PUC).

2. Because of the DSL, it follows that XF will have a resistivity towards further compression that will be equal in magnitude to the F_E. If we call the resistivity force towards further compression the xenoresist force F_R, then the two forces F_E and F_R are equal (but opposite) in magnitude,

|F_E| = |F_R|

 

III. We call xenogel (XG), a denser XF than its eXF. XG state may be viewed as a "crest" of eXF and be called xenocrest.

1. A XG "body" cannot be removed from its eXF being an integrant part of it. This is xenobond propriety of XG.

IV. By the First Fundamental Principle of Nature, XF cannot accommodate an indefinite compression as it will exist a maximum value density, called critical density , beyond which the XF state can no longer sustain compression. We call this new, maximum density state of existence of XS as the xenorigid (XR) state whose properties of characterization are as follows:

1. XR has no capacity for additional compression --the so-called xenoresist property of XR.

2. XR cannot be penetrated but it can be bent as XR by having no opposition toward decompression would allow the incoming force to bend the surface of XR transforming that part from XR into XF. We call this xenomalleability property of XR.

3. A XR "body" cannot hold the xenobond propriety with its environment. We call this the xenodisconnect property of XR. A XR object can be removed from its environmental xenofluid-space as all its bonds with XF-environment have been severed.

All states of existence of xenosubstance (XS) above the xenobase state (XB-state) were introduced as a result of some unspecified global compression and the study of the origin of those compressions at the primeval Level of Organization of Matter (LOM) is essential into gaining additional insight of primeval LOM. In this regard, how xenofluid (XF) is being produced in Nature is of paramount importance --this being our first step upwards in our long and unprecedented journey.

But before entering into the study of the formation of the xenofluid-state in Nature, in our next section, we will turn our attention to the other PIN (primary ingredient of Nature) --the vacuum (V).