Veloxe said:
Clearly the only option is to not show up for the presentation, since you don't exist to give it, seems reasonable to me!
I love it!
I could quote Descartes here, but that would just be redundant at this point. And since you're trying to prove that you don't exist it would also be pointless
The trick I can see here is that by doing, well anything under your own ability, you're proving, at least to yourself, that you exist. So really the only thing to do is to try and convince everyone else that you don't exist.
It's called Solipsism and it's best thought of as an extension on Descartes philosophy. IF Descarte says "I think therefore I am" a solipsist would say "I think, therefore I am the only one I can be sure exists." Try and get the people you're talking to to take a solipsist approach.