The Matrix nearly got it right. Reality is an illusion.
I am God. Nothing exists except me and all reality mearly exists in my consciousness. I have no physical body but I think of myself as having one. Everything that happens in 'the world' is a figment of my imagination. You do not exist outside of my 'mind'.
Now, you might think that's a load of old tosh - but that doesn't matter because you don't exist.
It's an argument that is totally irrefutable.