Satta: 'living being'. This term, just like attā puggala, jīva and all the other terms denoting 'ego-entity', is to be considered as a merely conventional term vohāra-vacana not possessing any reality-value. For the impersonality of all existence. see: anatta, paramattha puggala, jīva, satta, paticcasamuppāda.
Maha Thera Nyanatiloka. Manual of Buddhist Terms and Doctrines, Buddhist Publication Society, first edition 1952.