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I think you're on the right track - and the discourse from both sides is clearly wrong - but it goes deeper than that. 1. Facts may exist in the abstract, but in the real world, most facts aren't knowable as such. Every experiment makes decisions about how to set up its apparatus, what to do about measurement error. As such, everything that we choose to use the convenience of calling "observed facts" is really filtered through those factors of human judgment. And thus, all of our knowledge is tentative, depending on the quality of our experimental judgments. We really don't know with certainty as much as we tell ourselves that we do. In general, it's not an unpardonable sin for someone to claim your observations are not valid. (although in doing so, one, would expect more of an argument about why the method of observation was faulty, rather than just a "he said, she said" argument.) 2. As mentioned elsewhere in this thread, science even at its best can only tell us raw information. This does not lead inexorably to decisions about policy. This process necessarily passes through our values, at an individual and at a societal level. In a universe of finite resources and finite opportunities, we must always make the value judgments of which course of action is best, by analyzing expected benefits versus opportunity costs (not just monetary, but also in our moral and aesthetic senses), to see which course gives the greatest net benefit. (sorry for not giving concrete examples to explain. I'm afraid that if I were to do so, it would distract by causing debate about the examples themselves rather than my actual point) |