Re: How do you know that you exist?
follow this few steps you will know it
- Hit yourself against a wall,
- cut yourself with kniefs
- jump from a building or high altitude
- burn any of your body part
- and try this option too if you have a gun

e.t.c.,
there are many, but at intial stage start with anyone of the above step, if you hurt then you exist, other wise NO,
Please come back to me for more tips if you tests confirm that you exists.
Good luck
D