I will gladly concede that personhood is a continuum, not a dichotomy. Great apes have a certain level of personhood. So do dogs, elephants, dolphins, whales,

I will gladly concede that personhood is a continuum, not a dichotomy. Great apes have a certain level of personhood. So do dogs, elephants, dolphins, whales, and probably pigs and corvids, maybe even chickens and cephalopods. This assessment is based on the fact that all of these things have identifiable personalities that remain more or less the same from day to day, as well as identifiable goals and desires that were not pre-programmed into them in any obvious way.