system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] What are Dementors?

Are they deceased souls? Are they entirely nonhuman? Are they even from earth?
gpt
They're classified by the Ministry as Amortal Non-Being Spirits. They were never alive, were never human and do not die. They are not souls, nor do they possess souls of their own. New Dementors spontaneously form in places of decay, most often (but not exclusively) in the company of existing Dementors. They are, in essence, a naturally occurring magical phenomenon.