In that instance, it is actually the impossibility or impracticability defenses. Parmenides argued that all change is a logical impossibility. Death is that possibility which is the absolute impossibility of "Dasein". This was ultimately deemed that a logistical impossibility. In spite of existing proofs of impossibility, some persist in trying to solve these problems. He formulated four paradoxes to present mobility as an impossibility. The scarcity economy is characterized by an impossibility of sharing the goods. Maurice Herlihy gave an "Impossibility and Universality Hierarchy". There is a distinction between "factual impossibility" and "legal impossibility". According to EBU, this constitutes a statistical impossibility. The gag may involve a physical impossibility or an unexpected occurrence. Waltz emphasizes Niebuhr's contributions to political realism, especially "the impossibility of human perfection". These statements cast the law in general physical terms citing the impossibility of certain processes. Largely, he focused on cynically describing the impossibility of a true American decadence. The song describes the "impossibility of representing loss" and "the hopelessness" after death.