One should note that there are only two alternatives : Either unity = merging or a bilayer membrane which of course doesn't need to be optically visible. We believe that genuine simple [i.e. mono-layered] separating-membranes (thus not external boundary membranes) do not exist anywhere, because basically they cannot occur, and we see in it an experimentally testable indication for or against our view [namely the bilayer nature of all denaturation membranes]. Still to be investigated is the possibility that a bilayer membrane in its generation turns into a seemingly singular membrane as a result of connecting depositions [of materials in it]. This can certainly be detected as such.