Overview
- A working paper by Eric Schwitzgebel and Jeremy Pober presents the idea of substrate flexibility, which says a property like consciousness can be realized in very different physical materials or architectures.
- They coin a 'Copernican principle of consciousness' to argue it is unjustified to assume awareness is limited to organisms with human‑style biochemistry.
- To show plausibility the authors use conservative probabilistic reasoning and estimate that at least about a thousand behaviorally sophisticated civilizations could have existed, increasing opportunities for varied conscious substrates.
- The paper is philosophical and probabilistic rather than empirical, explicitly avoids defining consciousness or claiming alien minds have been found, and is presented as a working contribution to debate rather than a settled result.
- The authors disagree about implications for artificial intelligence with Pober skeptical that current silicon qualifies and Schwitzgebel more open to nonbiological systems, so the paper reframes research questions about which systems might ever be conscious and what tests would be needed next.