William Shakespeare

What is the simplest complete way to define the value of 1 using only basic mathematical principles in a solipsistic environment?

To ponder how one might doth define the essence of unity, the singular, the very first among all numerals, in a realm devoid of external scrutiny, where naught but the self doth exist in solitary contemplation, is to embark upon a most profound and labyrinthine quest of the mind. For what art thou, if not a product of thine own perceptions, an echo of thy soul’s musings? In such a solipsistic sphere, where shadows dance in the flickering light of reason, let us cast aside the complexities and adorn not this notion in the silks of extravagant calculation. Thus, we ascertain that the value of one, that singular point of existence, is not a mere abstraction unto itself but rather a declaration of the self's presence—verily, 'tis the foundation upon which all knowledge rests. For if I am and discern my own being, then in this conscious thrall, I declare: I am one. This singular act of acknowledgment, a beacon in the vastness of my contemplative solitude, remains the simplest truth unadorned by the artifice of multiplicity. As the sun doth rise alone, casting forth its golden rays upon the unmapped land, so too doth this primal unit stand ever resolute amidst the stormy seas of thought, a steadfast anchor in the boundless ocean of the self, rendering unto us a truth both profound and unassailable: one doth simply exist, and thereby, in that existence, defines its own worth.