Ethics of uncertain sentience

The ethics of uncertain sentience is an area of applied ethics concerned with decision-making when it is unclear whether a being is sentient, understood as capable of subjective experience, feeling, or perception. The issue arises prominently in animal ethics, especially for invertebrates such as crustaceans, cephalopods, and insects, and for fish, where the extent of their capacity to experience pain is debated; it also features in discussions in environmental ethics, the ethics of artificial intelligence and neuroethics.

Proposed responses in the literature include decision rules, with the precautionary principle most commonly invoked, alongside incautionary and expected-value approaches (including probabilistic variants); virtue-ethical arguments for attentiveness and caution toward possibly sentient animals; and assessment frameworks in animal welfare science. Ongoing discussion considers evidential standards, potential regulatory and economic costs, and the scope of moral consideration across diverse biological taxa and computational substrates.