This is just word games, or conceptual mumbo-jumbo. Self without self is the answer. It's also only words, but a conceptual pointer that points to non-conceptual understanding. You can say it's awareness, but this also only conceptual. Awareness by it's very nature connotes a subject/object relationship. Self is homogenous oneness, if a notion of other (I Am)arises in it, it has as much significance to the ocean as a ripple under the surface saying "I am ripple."
So maybe another way of saying the answer is that Existence is without any need to assert that it is. Just is-ness without any conceptual layer asserting that "I Am." Realization is understanding the nature of Consciousness and having that understanding reflected in that Consciousness, also called mind. Only in Oneness, can it be understood that nothing other exists. The moment the concept "I Am" raises its head, there is duality. This is why Consciousness is called the original Illusion. Nothing 'happens' as Illusion, and Consciousness is nothing, even though it seems to be the world appearance and unmanifest knowingness. It really does not exist, but very few understand the meaning of the statement that the world is untrue, or that it doesn't exist. Only one thing exists. What arises from nothing and disappears into nothing is only nothing, even though it appears to be something. What appears is only what something would be like if something ever was to be.
