Bifurcation note 1
This pre-to-Oedipal developmental, libidinal, linguistic bifurcation occurs about age 4. Loye (1989, The Sphinx and the Rainbow, notes that both Piaget and Lewin have theories of increasing time discrimination, and sense of the past and future. Also that Holobar (1969, The Sense of Time) specified age four as that for the emergence of a sense of time.