So if science (the study of empirical evidence) is abdicating its responsibility to define who does and doesn't count as a person, to which branch of human thou

So if science (the study of empirical evidence) is abdicating its responsibility to define who does and doesn't count as a person, to which branch of human thought should we submit the question? Philosophy? Religion? Psychology? What do each of them say in regards to the distinct nature of a person? HN makes for a pretty science-and-empirical-evidence-friendly crowd. I'm pretty sure each discipline (and probably more) has some idea what constitutes a person. My original question was meant to suss out where different people derived their definition of personhood from, and see if those conclusions had been arrived at by following facts or some other rational line of thought.