Philosophers Eric Schwitzgebel and Jeremy Pober argue that consciousness is not tied to Earthly biology. Their working paper reframes the debate by treating consciousness as a substrate flexibility phenomenon, suggesting that life built from alien materials could host mind. They cite examples from fiction and astrobiology to support this claim, and the potential of extraterrestrial cognition.

Schwitzgebel and Pober avoid defining consciousness, opting instead to ask whether it must be tied to Earth’s biology. They estimate that at least 1,000 behaviorally sophisticated alien civilizations have existed, drawing on surveys that suggest more than one civilization per galaxy over cosmic time. Their conservative figure underscores the likelihood that minds could arise elsewhere in the vast cosmos today.

Drawing on the Copernican principle, the authors argue that treating Earth life as uniquely conscious is *terrocentrism*. They note that terrestrial evolution has produced diverse nervous systems—from octopus to insect—yet no single design dominates. If consciousness can surface under varied biochemistry, the notion that only silicon‑based computers could ever be aware becomes less defensible in the modern debate on AI.

Schwitzgebel admits that today's silicon hardware may not support consciousness, while Pober warns against assuming it does. Their distinction between fine‑grained and coarse‑grained properties reframes the question from duplicating a human brain to identifying any system capable of conscious experience. The paper invites engineers to broaden AI research beyond biomimicry and consider alternative substrates for mind in future design decisions.