system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why isn't blood pressure a determining factor in defining whether if someone is dead or not?
gpt
It is. Having a heartbeat causes predictable fluctuations in blood pressure. When you check for a pulse, you're checking for fluctuations in blood pressure big enough that you can feel it with your fingers.

Perhaps you meant to ask about some nuance of blood pressure?