Bah, this is a solipsistic theory. If you disagree and point to your core self, you'll just be told that it's only another role, one that pretends/insists it's not a role. Bah.

None of this is all that different from the old cogito ergo sum. Yes, the information from your senses is suspect. And yes, your own cognitions are likewise suspect (though for different reasons). But at the end of the day, you still have to pick a place to stand, or it's all just academic masturbation.

Go, you!