Siebe said: “To know that one is living does’t that need citta vitthi’s running?”
Do you feel that you are living while you are in deep sleep? An extreme case is when one becomes unconscious.
Only while awake one can feel one is alive.
Siebe said: “I learned bhavanga is also the state in which we are when we are in deep dreamless sleep. Is this correct?”
No. Even in deep sleep there are atiparittarammana citta vithi running for breathing. But those do not have javana citta, and thus one does not feel them. Of course, in between those atiparittarammana citta vithi, mind is in bhavanga.