Emergence?

If the biosphere is to include intentional creatures, then the problem of stating its boundary conditions is not to do with complexity or emergence, but is a consequence of our being part of the biosphere.

To be able to state boundary conditions is to be in a certain intentional state, and any statement of biosphere boundary conditions would, inter alia, be a statement of the boundary conditions for being in intentional states, and so of the boundary conditions for being in that one in particular.  This means that these boundary conditions would have to define what it was to be in an intentional state, and what it was to be in the intentional state of being able to state boundary conditions.  It would be a boundary condition and also define what a boundary condition was.

This can't work, of course, because such a boundary condition would be computationally incomplete, or self-referential.  We couldn't state the boundary condition without first stating a boundary condition for stating boundary conditions, and so on ...

Again, we have to give our fundamental accounts in terms which include 'primitive' intentional states which cannot be defined away.