Quote (Neptunus @ 28 Sep 2016 07:02)
Lets say then that the degree of absoluteness is much smaller in medicine and nutrition than in physics, for example. So far nothing conflicts with general and special relativity, and therefore it's predictions are absolute as long as we don't have a better model.
In medicine and nutrition we don't have such exact models. That's why they're not called exact sciences, though they are sciences nevertheless.
Four part reply:
1. there are plenty of conflicts with both forms of relativity, but they are mostly internally coherent theories which fail to explain various "anomalies", including, famously, what's going on with black holes, for example. so you could say the same thing about newtonian physics. it does well in a little box. but the universe is a very, very big box. it's not like relativity has never met with problems when encountered by the essentials of quantum physics, let alone rogueish theories like string theory. there is an explanatory borderline, a membrane, and it's like a distributed mass rather than a point in logical space, and relatively meets with a lot of friction when it bumps into it; that is, right into reality. i wrote my thesis on abstract objects, and one of the stumbling blocks to a clear definition of an object is that it's an incredibly diverse concept; you cannot explain 'objects' via relativity, that's for certain. you can say than an object is anything with both mass and energy, but that's just the beginning.
2. the degree of certainty of any science is directly proportional to the potency of the dominant mythology around it; of course, science is unfolding truth, giving us a greater grasp of reality. but we're just conscious beings reflecting on whence we came; we aren't going to get direct access to static facts about the universe--ever. or we can get 'facts' but only the facts that we agree on with our conventions, our logic, etc. but even logic is a terrible guide. Stephen Read's
Thinking About Logic: An Introduction to the Philosophy Of Logic is the classic source.
3. Overly defensive scientists will rail to the defense of scientific method, results, logic, etc.. And even though it is quite clear that science will never allow us to "touch" reality or truth any more than we are already immersed in it by being in the universe, the refinements of science serve an important practical service. This is abundantly clear because we can look at the progress science has made. Without it, our medicine would not be as robust, our economics would be impossible to understand (they still are, because we're involved in it and we cloud it up), we wouldn't have a whole lot of cool and helpful technology, etc. etc.. It's the practical use of science as well as the joy of discovery inherent in its practice that makes it one of our greatest pursuits. It gives us context and meaning, and it enables us to sort through the rubbish of information.
4. So when it is said that science is not absolute, my question is: absolute in respect to what? It IS absolute, so far as it brings us close to the limits of human inquiry. It is an absolute challenge to our intellect. It can bring us together and improve our lives. And insofar as we are beings who NEED mythology, it is a beautiful and provocative mythology. Let us take a moment to compare all the harms done in the names of religion and freedom and compare those against the grandeur and beauty science has given us. Science is not a neutral game, but it's neutral with respect to our morality, and so far, thankfully, it has not been so bastardized as to become our closest link to death. results in medicine, nutrition -- just about anything -- are made better and more efficiently through science. My point is that we can crap on the absoluteness of any science but why not focus on what it does to make life better?

// Nutrition is not an exact science and it's incredibly complex because our bodies are incredibly complex (our chemistry, our systems). It hasn't received nearly enough attention in the scientific world but I think we know enough to know that science is our best guide to understanding it.