Separation of Church and State

It has always been a topic of confusion for me. We are a nation founded on the separation of church and state. But for many people, tenets of their religion are not only a matter of faith for them, but of objective reality, as well. So, if the government is run by the will of the people, and the will of the people reflects religious beliefs, where do we draw the line? If I believe that the bible tells me that life begins when the sperm enters the egg and creates an embryo, is that necessarily true? Or does it begin when it's implanted into a womb and begins to divide? Or that life was created and evolved in the way described by Intelligent Design theory? And should I be able to demand that policy be made to support this belief? It seems like that would be legislating the morality of a religion, and therefore not a separation of church and state. So, how should a government create legislation and policy? George Will clarified the issue for me (who I rarely agree with, btw) in a July 4th issue of Newsweek.

"The problem with intelligent-design theory is not that it is false but that it is not falsifiable: Not being susceptible to contradicting evidence, it is not a testable hypothesis. Hence it is not a scientific but a creedal tenet—a matter of faith, unsuited to a public school's science curriculum."

What? Waaaa!!?? You need evidence to make decisions?

This quote is great, because it illustrates a good point. The idea of Intelligent Design is in a sense, diabolical, because it inherently tries to place itself on a level playing field with science, characterizing science as a "theory". Really, science is much more than that, and it sometimes gets a bad rap. Shouldn't we demand that the laws and policies that govern us have some basis in repeatable, verifiable evidence? Isn't that what the scientific method is all about?