@Leadfoot,
If you don't define the words you are using, then any discussion is meaningless. Fine.. forget "scientific". You are using the word "death" in a way that makes no sense in any common use of the word.
My daughter sleeps every night. She keeps breathing. Her heart keeps pumping. Most importantly she wakes up in the morning (at which point she is no longer asleep). My grandmother died. I was there. I felt her get cold and I saw her stop breathing. She was dead. Maybe the instant her brain stopped working some ethereal being with her essence sprung into existance. Even if this is the case, my statement that "my grandmother is dead" is completely correct.
When you are sleeping you are not dead. When you are dead, you are not sleeping.
Now of course you can use a metaphor.
Death is a banana. But if I don't explain to you what it means for death to be a banana, it is simply nonsense.
You asked me what death means to me. I gave you a simple, straightforward answer that makes sense. Death is the cessation of biological processes. You then say I am trolling.
You have so far failed to say anything about death that makes any sense. Maybe it is you who are trolling.