I am living, i occupy space, i matter. I am matter.
And what even [i]is[/i] existence? If i am inside this universe in any way shape or form, well i exist. Things that havent been created yet exist, because someone, somewhere is thinking or has thought about it.
Its not a matter of being alive, its existing. The fact i am even posting this right now proves my existence, because even if im nothing more than a few megabytes on the internet, i still exist.