i think both of those references are exactly appropriate, because guys like Phillip and Bobby Fischer manifested perfectly the schizophrenia that results from the extreme egocentrism of Descartes and Plato.. Dick expresses the dislocation experienced by a completely disembodied ego in everything he says and writes.. his identity has no reference points around him, so it is free to associate with whatever images appear in his head.. he is free to assume that everything around him is an illusion of some kind..