Is it possible to categorically not exist? You exist as a human now, not intelligent now, not a human being now. Being a BEING requires etymology of the word existence, and existence is not a predicate, it must be proven. 4 requirement must occur to prove intelligent existence;
1 a fact of living
2 a fact of objective reality
3 a state of living
4 a state of objective reality.
all 4 must exist to be an intelligent being existing in the universe, in time, the continuum.
If you exist in Einstein Relative reality you are not an intelligent being, its precluded by objective reality being required. TIME MAN.