Stop going in circles. A mathematical proof does not create equivalence; it demonstrates it.
The equivalence of sensitivities existed before any proof, as an intrinsic property.
Our investment decisions based on Swedish actuarial principles require rigor, not constructions.
For example, the balance between assets and liabilities of a public pension fund does not depend on a proof of its existence, but on the economic reality.
Let's set the level: proof confirms, it does not generate.