When we say that there is something after death (or not), we
usually mean that, after the body disappears, we still feel and
think something (or not). So let's determine whether you will
feel anything after death, and whether you will
think anything.
Feel
Your senses will stop working after you die. It's a
fact: your eyes will not transmit images any more because of
neuronal activity cessation, your ears will lose their connections
with your brains, and so on. So you will have no contact whatsoever
with the world. Sorry about that.
Think
The activity of your mind depends on your circulating system
supplying your brains with blood and oxygen. Indeed, if the blood
or oxygen level in your brains goes down too much, your mind almost
stops working, and you collapse. After death, the oxygen and blood
levels will go down to zero. Therefore your mind will have no
activity at all. You will be completely unsconscious. You will not
even dream.
What defines the mind is the ability to think about something, i.e
to be conscious in some way (which includes dreaming). Therefore, if
you are permanently and completely unsconscious, we can say that your
mind is dead. It's an ex-mind. You are an ex-Everythingian.
That is why I would be very surprised if there was anything after
death. Please correct me if you happen to be a dead person or an
omniscient god.