So you when to hell now what.

[dyresand]

That's the thing, you can't tell till someone comes back from being almost dead, and tells you.

Which is also why it can never be tested (ethically).

So there's no way to scientifically test them, NDE testimony is pure anecdote, and vary vastly from person to person.

How exactly can you use this as evidence for anything?

when people have NDE's the usual god type talk about heaven and hell.
the brain has some residual activity when a person dies and when they are brought back they talk about their NDE or "hallucination".