Two examples of supervised weekly analytic psychotherapy are described, demonstrating how thought categories in bi-logic may help both in conceptualizing, understanding and interpreting a specific difficulty in early development concerned with separation at the time of birth.

Such a difficulty in differentiating from the mother in a 2-person state may further point to a key deficit concerning the inner notating of father, as well as mother, in a 3-person differentiation. These two difficulties may reciprocally affect each other, with the result that a partial state of fusion between self and others is chronically kept in being until adulthood.