We all think our memory is in our brain when it is not. You will have to read Karl Lashley and Karl Pribam work to understand it.
http://en.wikipedia.org/wiki/Karl_Lashley,
http://en.wikipedia.org/wiki/Karl_H._Pribram
We all think our body is made of physical material but when we study quantum mechanics we understand we're all made of energy.
Such debate about life after death or not is pointless. I still wonder why some care there's life after death and the others want to explain them there's none.
Doing this we look like believers trying to convert others to our religion.