So I'm reading a collection of Phillip K. Dick short stories, and I got to one called "Second Variety," the plot of which is that autonomous, self-replicating military robots learn to imitate humans and then break from the control of human military command. Only a few models exist, and within a model there is only the one exactly identical kind of robot--so thousands of "Davids" for instance. The title derives from a major paranoia-inducing plot point, in that the humans have found models labeled "I" and "III", but don't know what the "second variety" looks like. This means that everyone's always accusing each other of being robots, etc, etc. There's even conflict between the different models, as it's mentioned that they do not coordinate due to each coming from a different factory.
So, the similarities to the arising of humanoid Cylons in numbered models is obvious, and if you google "BSG second variety" you get several website noting the similarity. But has RDM ever talked about it explicitly? Just curious.