I am looking at Plato's Philebus. My straightforward question is whether anybody has ever read Plato's theory of the tripartite soul as an underlying theme of the Philebus too.
Any pointer to some specific reference is welcome.
EDIT. Consider the following too. A (misguided?) question I asked myself is whether Plato considered somehow the possibility of entities (persons?) whose soul is somehow just only one of the three parts. So, for Plato are there only reason entities, only appetite entities, and only thymos entities?
In the Philebus, I do think that that is somehow addressed: at 21a-d Socrates asks whether a only pleasure life -say, only (satisfaction of) appetites- could be worth living (it would not, since it would be a mollusc or some other shell-fish like the oyster kind of life). At 21d-e, Socrates asks whether anyone would be willing to live possessing wisdom and mind and knowledge and perfect memory of all things but having no share, great or small, in pleasure, or in pain, for that matter, but being utterly unaffected by everything of that sort (Protarchus answers -without further explanation- that that would not be a desirable life). (see 60-c too). I am not sure about thymos. Eventually, 59c-e, the discussion is about the best (good, measured,...) mixture of thought and pleasure, and that could be related to the role of thymos.