Hmmm. I don’t think so. Descartes didn’t get much right, but he pretty much nailed it when he said, “I think, therefore I am.” You can approach pretty much everything with total skepticism regarding its existence. But you can’t perceive these things and think about them without acknowledging that there is some entity — called “you” — that is capable of thought and perception.
Can you be more sure of a separate entity's non-existence than you can be of your own existence?