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> They can’t point to an existing system that poses existential risk, because it doesn’t exist. They can’t point to a clear architecture for such a system, because we don’t know how to build it.

Inductive reasoning is in favor of their argument being possible. From observing nature, we know that a variety of intelligent species can emerge from physical phenomenon alone. Historically, the dominance of one intelligent species has contributed to the extinction of others. Given this, it can be said that AI might cause our extinction.