Can't be done. Back to, "Do you exist?" (That is as an individual apart from all other individuals i.e. not a sock puppet) There must be a presumption of existence for you to even consider the question. Or any other question. And you need to define the discussion - a (hopefully) mutually understood definition of what is being discussed.
The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh
