Defenders of animals' rights argue that other people are "speciesists" (like some people are racists). I would like to ask if speciesism is always wrong. Suppose healthy adult people have some features that make them important (say, they can speak and they can reason in complicated ways) and that no non-human animals have. Suppose those features give adult healthy humans some rights. Is it necessarily wrong to assign those rights also to human babies and mentally handicapped humans, but not to non-human animals? We would recognize those rights in babies and the mentally impaired because we like them more than we like other animals (as a matter of fact, most of us are speciesists), but animals couldn't complain about that, could they? Anyway, they wouldn't be offended. I also think this argument would not make racism acceptable.