If existence always goes with noability, then existence and no ability are not two different things. There must be some relationship between them. Nowability and existence are related. So existence of anything depends on noability. And by noability i include not just gross knowability that you can see it or hear it or smell it or touch it. I'll give you the sanscrit words also. Something that is knowable is promium. Just know these words, a, prameam, pramana and pramata. Pramata means nowere. Pramana means instrument of knowledge. This is unknowable. And i serva prianand am the knower.