skipped most of the thread for now, but this was interesting
Is a dead person a person?
so there's basically four ways to go about it here
one is the scientific. there's the biological way to define it, where a dead tree is definitely a tree. is a dead person a person? no. but a dead person is a body, which a person innately is. there's no real biological structure for what constitutes personhood at this point; there's questions of sapience and sentience, but it doesn't generally tend towards personhood
the other way is to look into basically the number of structural ways we define a tree in philosophy, as a phenomenon, as an object, as a stratification, as an idea, whatever, soandsoforth. it's then contextual to the specific way of thinking whether the two states (dead or alive) are the same (and here, too, personhood is largely ill-defined)
then there's a legal category which is similarly arbitrary but has specific contextual use (personhood is defined, trees are... not well defined i believe, but are as constituted in a few laws)
last is the poetic or that of the arts, and then it's all signifiers anyways, referring to a person rather than being the person itself, like how art references things by material induction while not being things.
in all cases, it's mostly agreed that some sort of personhood exists. it's just also all over the place what a person entails still, either given by a power structure, speculated forward, refered to, or being bickered over. so whether a dead person is also a person really depends on what a person is.
from that, ofc, we can also return to what a "tree" is, exactly, in order to similarly be able to define whether a dead tree is a tree. there's a number of answers there, and a lot of fun stuff going on
vsauce did a pretty good rundown on some of the problems of constitutions of objects/phenomena, although i'm a bit sad at his use of sources