[darkmighty]

You're confusing science with mathematics. There are no theorems in science, it's all experimental. We have certainty on a few basic principles or models and make inferences based on those models.

I'm not going to defend sociology specifically because I don't know the field or it's state, but in every science (e.g. chemistry), you make a model for some restricted case to fit some data and you make assumptions on the scope of the model. Otherwise you couldn't say pretty much anything about anything: "We tested that proton and that one has a mass of X units. We can't say anything about this proton, thogh." -- the evidence piles up that the model has widespread vality. In the same sense, we can make assumptions on the scope of models. Of course, I imagine we have no hope for the time being of uniting the basic physical laws to that of sociology, simply because we don't have the power to understand the human brain just yet. I don't think refraining from modelling behavior is useful, and it will probably even help us better model the brain and generalize it's behavior towards "better" intelligence (AI).