Privacy may be understood as a necessary precondition for the development and preservation of personhood. That is a necessary precondition for understanding the mind-body problem. In some situations, it is a necessary precondition for other humanitarian programs. Friedman argues for economic freedom as a precondition for political freedom. Legal obligation is not the precondition for life and relationship. Consequently, works are the necessary response to grace and not the precondition for it. The problem is that this independence is a precondition of constructing an isoquant. An arbitrage equilibrium is a precondition for a general economic equilibrium. Authenticity could be seen as a precondition for ethical leadership. An issue regarding the third "Gingles" precondition remains unresolved. Authenticity could be also seen as a precondition for ethical decisions. Therefore, sieving results are reproducible and precise (an important precondition for a significant analysis). Bavaria insisted on its application throughout Germany as a precondition of German unification in 1871. It repeatedly visits the nests that it has parasitised, a precondition for the mafia hypothesis. It also describes several scenarios, each with a precondition, trigger and expected outcome.