Brain death.
Hao Ren knew it. The brain loses its function, but sometimes the autonomic nervous system can survive for a while, and the limbs can experience some residual conditioned reflex ability. But simple conditioned reflex cannot maintain a complex life system, so brain-dead humans need a lot of tubes and air pumps to survive. All in all, it's a very sad state.
But he did not know that the First Born would experience brain death and its tentacles were still responsive.
"Are you sure?" Hao Ren asked again, just to make sure, but Nolan was strongly dissatisfied with his questioning. "Boss, you have to trust my deduction and calculation skills. I think about this with a shipboard mainframe that can deduce the evolution of stars. And I have a huge database. I make my judgments based on huge amounts of data and real-time updates, not on a blind guess."