When D. Adams said, “an infinite number of worlds, simply because there is an infinite amount of space for them . ” imagine that he was thinking that it is infinite divisibility (of space) that justified for him the word “simply”. In other words imagine matter that must take up some space in its place. The place of this space is always divisible, so picture a line between two parts of this space as an operation that Adams could always do. Thus no matter how large or small of local area of matter occupancy is there is , as per the assumption, always an infinte number of lines drawn in the “universe” of this ”infinite’ space. Thus the number of material “worlds” is equipollent with the number of divisions argued for. If space is infinitely divisible even starting with an infinite spread of matter in its places there can be an infinite number worlds or an infinite amount of smaller divisions if the initial size is not infinite.
So, when Adams, said, “not every one of them is inhabited”, I took him to mean that on one side or the other of at least one division there is some location that is only the place of impenetrable matter and not necessarily having life, a particular kind of organized matter, in it, but as he said “not every one of them” he must have meant that for every division one could not make an orthogonal cut to ALL of the divisions (infinite) and find life in every one. That was what he started with.
Therefore, as there are only marginal placements where life may exist, these must be a finite cut-up of the original size no matter what size it is. In this way life only exists at a finite number of locations.
I think this reasoning may be more than simply a mind game.
I have begun to sketch how Panbiogeography via evolutionary graph theory may indeed justify thoughts about both the infinite (here the dashed lines indicate the infinite divisions of Adams etc)
and finite variety.
I would simply disagree with Adams that it can not be thought that life is not “in” every one of an infinte number of separations of physics’ space. What is required is a clear notion of a right angle biologically. This seems possible where graph theory may draw a topology that is not on geodesics. I have not proved this yet even for the fusion of the two kinds of graph theory I introduce here:
http://axiompanbiog.com/vcarandtclaim.aspx
What is required as a prerequisite in the thought is to show that Moran processes and HW equilibrium converge for a given track claim but because Panbiogeography do not guarantee equal weights the cause and correlation must be specified “into” the physics somewhat, which we were only assuming in Adams’ case (an infinite amount of space) (this *may* be a linguistic infinity of deep structure instead in reality).
You could be correct if the space infinitly overdetermines the places the matter exists in the space but I take it Adams precluded that when he wrote "NOT EVERY"*****ONE*****. I took that to indicate that matter created the oneness but space bounded it, like Newton that Earth may be thought dynamically to a point(one earth- one point).