Moral uncertainty - not knowing which ethical framework is correct - is pervasive in animal ethics, and learning to act wisely under uncertainty is essential for effective advocates.
Acting ethically toward animals under moral uncertainty is both necessary and achievable. We do not need to resolve all philosophical debates about animal consciousness or rights to act. Where multiple ethical frameworks - utilitarian concern for suffering, rights-based respect for subjects-of-a-life, virtue ethics emphasising compassion - all point toward the same conclusion, confidence in that conclusion is warranted. Factory farming fails on virtually every ethical framework; the moral case against it is robust under uncertainty. Effective animal advocates embrace uncertainty honestly rather than overstating certainty, because honest engagement with the difficulty of these questions is more persuasive to thoughtful audiences than dogmatic assertion. Precautionary principles are especially important when the potential harms are severe and the costs of precaution are modest.