We need metaphysical and epistemological knowledge upon which to base science. If you assert, "Science is the only way to get knowledge," you are making an epistemological claim. If you say, "The universe behaves according to predictable and quantifiable laws," then you have made a metaphysical claim. Epistemology and metaphysics are presupposed by empirical science, and anyone even making the claim that "empirical science is the only way to gain knowledge" has refuted him or herself by making an epistemological claim.
The only way to find an answer to a question, is the way you view things, when you give someone data, or when you reproduce a result, Death, the effect on a man or woman's consciousness, cannot be found through scientific finds, because whether or not someone is dead relates to the functions in a body. We say people die, but death itself is impossible, due to the chance that one day, one million centuries in the future, someone could reintroduce a consciousness into a body. The only way we could describe things, are on the positions and data we hold current, but we can never know what will happen over a period of measurement. For example, what happens if we measure our time in days, but our planet changes shape, days would be inaccurate. Our data would be flawed, we would not be able to qualify our data as useable, unless comparing before and after.