Yes, RightWhale -- well, at least the "natural" part. However, Bauer's biological principle, which Grandpierre (rather humorously) refers to the as Aikido principle of life, is not consciousness of the epiphenomenal type, which is far-lower order, and essentially random. Epiphenomenal consciousness does not have a principle by which it can modify its own internal states, in sensitive adjustment to changes in exterior and interior conditions. There is nothing to show that epiphenomenal consciousness has a principle by which it can grasp that it is alive as an organic biological whole, or develop a sense of identity (of experience of itself), let alone self-identity.
Epiphenomenal consciousness may be a feature of inorganic nature. But for biological life, it appears woefully insufficient to explain the consciousness of the higher forms of biological life, through animals and up to man. It has been noted that even E. coli appears to generate a kind of primitive "brain" organization. By what principle can this be an epiphenomenal activity? It appears to me to be distinctly a phenomenal one. Here we see the tension between the structural and the phenomenological -- "the integrative science" of these three theorists.
Very well, and only reasonably (and intuitively) put.