By "we" I mean the human species in general. The fact that some of us may not have the power of speech does not make that subset less human. We have no idea what love is and it's only the fact that we can talk about it that makes us think we somehow understand what it is. The big thing we really thought had over the other animals is that we have a consciousness of self and other, although we are starting to see that some other animals have the same level of consciousness.