Ultimate existence and the self in Mahayana
According to Tibetan system of tenets, the Vaibhāṣikas so-called 'Hinayana school of tenets' defines an ultimte truth as:


  A phenomenon such that an awareness apprehending it is not cancelled
  if it is broken up or mentally separated into its individual parts.


Illustrations of ultimate truths are: 


  directionally partless particles, temporally partless [moments of]
  consciousness, uncompounded phenomena, any of the five aggregates.



Mahayana tenets assert that Vaïbashikas do not posit selflessness of phenomena, but merely [a grosser] selflessness of persons. Jetsün Chökyi Gyaltsen writes:


  A selflessness of phenomena is not accepted because it is accepted
  that if it is an established base it is necessarily a self of
  phenomena.