Where are the edges?
If its true that becoming, rather than being, is the core phenomenon of life (and I think it is) then the attempt to divvy up reality into pieces is misguided.
I was interested, therefore, to come across a piece of research looking into the issue of water’s boundary between liquid and gas phases. It turns out it’s just about impossible to draw the boundary.
The researchers concluded that the change between air and water happens in the space of a single water molecule.
“You recover the bulk phase of water extremely quickly,” Benderskii said.
While the transition happens in the uppermost layer of water molecules, the molecules involved change constantly. Even when they rise to the top layer, molecules for the most part are wholly submerged, spending only a quarter of their time straddling air and water.
The study raises the question of how exactly to define the air-water boundary.
Where do I end and you begin?
Heroes Not Zombies 
I’ve never thought about this in terms of physical boundaries, I’ll admit, but I have thought often about the ideas of seasons, or even of daytime and nighttime. When is it really “summer?” I mean, sure, we have the solstice, but we ease into seasons like we ease through a day; it’s less of a marked event like flipping a switch and more of a flow.
I heard this and thought of you, Doc: http://www.nhpr.org/overdiagnosed-0
Love!
Chili