Hmm, now that is really interesting! My initial reaction to your question is, "Of course they're separate entities." But then the person I'm replying to probably thinks, "Of course they're a single entity."
Is that the true division between conspiracy-minded people and others?
I don't agree with rdtsc's either, and I am not "conspiracy-minded" just because I point out that your einstein-clown argument is fallacious.
Therefore I would not like to draw that line. I would however say it's a division between our views. I do believe that a government can be considered a single entity. Care to explain why you disagree?
The government is a collection of a lot of different entities with different views, resources, and goals. It doesn't make sense to me to say that e.g. the FDA and the NSA are part of the same entity.
Furthermore, what's being discussed involves non-government actors too. Exxon, doctors, and defense contractors are entities outside the government.
The truth of one conspiracy cannot be used as evidence for the truth of others. It simply doesn't make sense.
[0] They didn't really laugh at Einstein, but you get the idea.