From epistemological point of view I see nearly no difference about those three. We run models in our head (and sometimes with the use of pen and paper or computer) about the properties of the surround world. The models in our heads compete with each other for being accepted on top level as operational. Usually we assume that they describe the world the best way possible. Arguably none of those are precise. Newton physics is not precise, for example, nor our current moral value set.
Those models, those memes, are evolving in time with their own mutations and selection criteria in our brains. We as society, and as individual always modify them, select the best one, and they are in sort of competition. So, what's the difference? Theories change in time, beauty standards change in time, moral values change in time. Knowledge is generated in all three areas. Experimental tests are done as part of the selection criteria in all three arias, sometimes intentionally, sometimes not. By this standard if we accept that there are objectively true scientific theories, then there should be objectively true moral values and beauty standards. Why not? I have problem to point on the difference.
Those models, those memes, are evolving in time with their own mutations and selection criteria in our brains. We as society, and as individual always modify them, select the best one, and they are in sort of competition. So, what's the difference? Theories change in time, beauty standards change in time, moral values change in time. Knowledge is generated in all three areas. Experimental tests are done as part of the selection criteria in all three arias, sometimes intentionally, sometimes not. By this standard if we accept that there are objectively true scientific theories, then there should be objectively true moral values and beauty standards. Why not? I have problem to point on the difference.