A term used to describe
something that is so abstract, intangible, or
hypothetical that it exists only in theory or
imagination and cannot be proven to exist in reality. It's a blend of "unexist" (not existing) and "ability" (the quality or state of being capable).
Person 1: "Do you think there's life on other planets?"
Person 2: "It's an
intriguing question, but until we have concrete evidence, it remains in
the realm of unexistability, existing only in our imaginations and
scientific theories."