Given the fact that @Banno begged the question in favor of his own view, I would correct that by saying that the the relationship “to begin with” has to do with the dictionary definitions of those words. It does not start with Banno’s, “a list of how things are cannot imply what to do.” That’s his desired conclusion, his preferred interpretation. That’s not a matter of “what the relationship between facts and values is to begin with.”
It often turns out that the people involved in a dispute are unable to neutrally describe the problem at hand or the terms in question. This is one of those areas, which is why I am not going to try. But if you go to a dictionary or a third party that is fully unaware of the dispute you have a good chance of receiving a neutral sense of the terms. I actually think that modern authorities will tend to favor a “separation” view.