"In general? Then I would absolutely argue that it is attainable. We had achieved such a world where I come from." But his speaking of it in the past tense probably gives away that it didn't last forever.
"Ah... vanish?" Nobody had warned him about people vanishing, and he frowns. "What happens to those who do so?"
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"Ah... vanish?" Nobody had warned him about people vanishing, and he frowns. "What happens to those who do so?"