Science policy decision making

Science policy decision making, it could be difficult at times, this paper (http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0031824) addresses questions such as: “understanding the role of scientific evidence in policymaking” and “democratic governance of scientific advice”. The questions themselves include “Under what conditions does scientific evidence legitimise political decisions?” and “What impact has research on the relationship between science and policy actually had on science policy?” but are the "science" and "policy" separable? a thought provoking article in any case...