# Biological Naturalism **Domain:** Philosophy of Mind / Consciousness / Biology **Doc Type:** Theory Node **Classification:** Causal-Powers Objection **Maturity:** Established Debate **Related:** [[wiki/John Searle|John Searle]], [[wiki/Consciousness|Consciousness]], [[wiki/Substrate Independence|Substrate Independence]] --- ## Position **Biological Naturalism** is John Searle's view that consciousness is a real biological phenomenon caused by lower-level neurobiological processes and realized in biological systems. Conscious states are not separate substances, but neither are they exhausted by an abstract program description or an observer-relative simulation. ## Challenge to Functional Reconstruction A system may duplicate input-output behavior or computational organization without duplicating the causal powers that produce subjectivity. On this account, simulating a brain is no more sufficient for consciousness than simulating digestion is sufficient for digesting food. The objection targets the inference from functional equivalence to phenomenal instantiation. ## Evidence Consequence Continuity claims require more than behavioral indistinguishability if biological naturalism is possible. The architecture must keep open at least three hypotheses: consciousness is multiply realizable; only certain physical causal organizations realize it; or biological processes are indispensable. Current evidence does not authorize silently selecting the first. ## Sources - John R. Searle, *The Rediscovery of the Mind* (MIT Press, 1992). - [Stanford Encyclopedia of Philosophy — Qualia](https://plato.stanford.edu/entries/qualia/) ## See Also [[wiki/Hard Problem of Consciousness|Hard Problem of Consciousness]] · [[wiki/Qualia|Qualia]] · [[wiki/State Sufficiency Problem|State Sufficiency Problem]]