(just as a matter of interest, I was not referring to any particular individual post or opinion, but merely to the general notion-- often heard-- that we 'should' behave in certain ways regarding chimps and other animals.... if I decide to pick on anyone in particular, LH... *grin*.. I'll try to quote them. You may be forgiven for suspecting I was after you, given our debate history.)

(I use a similar argument about 'souls' when I ask: "When did humans acquire them?" If one accepts evolution at all, it becomes relevant to ask where in our history various 'moral principles' began to apply. This not a common question, and it really bothers many fundamentalists when I ask it.)