> Errrr....I'm clearly missing something cos this seems quite
> straightforward. Apes do groom and manatees do nurture, because these are
> not acts which presuppose a set of human categories. Birds tweet, but
> don't really sing; magpies take but don't really steal, because singing
> and
> stealing do presuppose these human categories. Male animals force females
> to mate, but only humans rape.
>
True. But there is a tautology here, no? "Forced copulation in animals is not comparable to forced copulation in humans because one concerns humans and the other concerns animals." More is needed to give this argument force.
Seth