I do love science fiction but it's not really a genre unto itself it always seems to merge with another genre. With the few movies I've done I've ended up playing with genre in some way or another so any genre that's made to mix with others is like candy to me. It allows you to use big mythic situations to talk about ordinary things.
If you look at the purported dangers of salt or fat there is no consensus of support in scientific literature. So I would ask first: 'Is it possible to have an informed government that actually follows the science?' From what I've seen it's not likely.
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A third ideal that has made its way in the modern world is reliance on reason especially reason disciplined and enriched by modern science. An eternal basis of human intercommunication is reason.