The phrase "theoretical essence" is correct and usable in written English.
You can use it to refer to the abstract, philosophical foundations of a concept, idea, or theory. For example, "We examined the theoretical essence of the argument to uncover the assumptions it was based on."
Most "experimental" 3-D coordinates for small molecules provided by the PDB are, in essence, theoretical models derived from fitting electron density produced by X-ray diffraction experiments to the presumed location of atoms that are part of a protein, a ligand (typically bound to the protein), and other moieties (ions, water molecules, etc).
At the beginning of the clarify and mentioned some theoretical notions, but the essence of the paper is devoted to the analyzed and designed simulation model.
This paper proposes a theoretical approach to capture the essence of artists' insights with 14 aesthetic measures for graphic displays.
The key insight was the Turing machine a simple theoretical construct that captured the essence of abstract symbol manipulation.
Lave and Wenger's situated learning theory, community(s) of practice (CoP) [ 12, 13] provides a theoretical framework that captures the essence of the clerkship pedagogical approach [ 14].
Few have reflected scholarly on the essence of the theoretical basis of clinical practice, and on the relationship between research and practice.
Only today are scientists appreciating the work he did in his last years, and every computer user can be thankful for his theoretical Turing machine, which captured the essence of the machines we all use.
Indeed, it's probably the essence of being a theoretical astrophysicist.
In essence, most of the theoretical biochemical gains and harm with bicarbonate administration were not evident in actual case scenarios, and the overall physiological impact with such treatment is dismal.
You see this pin and you assume it's about UFOs, but as a conspiracy theorist myself, I can assure you that this pin's essence transcends purely UFO-theoretical grounds.
