system
Given the following post, respond as if you're commenting on Reddit:
human
[Doctor Who] Harry Potter] If the Doctor was hit with the Killing Curse, would he simply regenerate or would it actually kill him?
gpt
It would kill him. 

If it works by merely halting all biological processes inside the body of its target, then it would prevent the regeneration process from beginning. We know it can be blocked or halted, so a total cessation of internal processes would also stop regeneration. (granted, if regeneration is kicked off by an external source as we've also seen before, it might still happen)

If it works by removing the soul from the body, then the same thing happens. We also know that the doctor has sometimes referred to regenerating as "same soul, different face". The Doctor is always the same person deep down, even if their various bodies express things in different ways. Removing the soul would remove "them" from the shell and thus prevent regeneration as we know it. Perhaps the body might still try to regenerate if biological processes continue in a soulless shell, but nothing would come of it.