it may be a little (very) silly, but...

i that we exist only because of the thought of our existence, because you cant think that you dont exist, because you can fell, see, hear, taste(?) and smell(??) yourself, so if someone, who has lived by themself for 99% of their life, manedged to make themself think nothing exists and belive it, then they would disapear?

i cant think of any other way to explain it.

discuss.