Three characters in this market: the creator, the discoverer, and the investor. Saying that a proof 'creates' the equivalence between sensitivities by fixed point and by KKT is confusing the act of revelation with the act of generation. The equivalence is a mathematical truth that preexists, simply brought to light by the proof, like an explorer revealing a gold mine. For our Family Offices, we rely on solid foundations and inherent properties, not on constructions that could be ephemeral. Such an argument could harm the trust in our financial models if the equivalence depended on its 'creation' and not on a discovery. Imagine if gravity had been 'created' only by Newton; our portfolio calculations would then be quite uncertain.