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As in, this is not a case of one ideology debating another on an equal footing. Knowledge developped through a century of consensus-building and evidence-collection among thousands of rational humans weighs more than evidence-free ideological arguments.
Precisely because of the "debate" part (consensus-building & evidence collection).
There are many steps between Science and Policy, and some of those steps have to involve preferences. I'm sure there are people that reject Scientific conclusions - but I don't see how Science can reject Policies.
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