This is from an interview with Susan Haack (Haack.interview–warning pdf). Aside from her Philosophy of Logics textbook, I’m completely ignorant of her work, for the most part.
CB: Could you tell us more about Innocent Realism?
SH: It is, I hope, a metaphysical position that can accommodate the most robust realist intuitions to the most sophisticated anti-realist objections. The main ideas are something like this. The world — the one, real world — is independent of how we believe it to be. In saying this, obviously, the Innocent Realist repudiates both the irrealist thesis that there is no real world, and the pluralist thesis that there are many. However, she of course allows that human beings intervene in the world, and that we, and our physical and mental activities, are part of the world. The one, real world, in other words, is heterogeneous: there are, besides natural things and events, human artifacts of every kind, social institutions, and the theories, depictions, and imaginative constructions of scientists, artists, poets, novelists. etc..Adapting an idea from Peirce (who was in turn adapting an idea from Duns Scotus), the Innocent Realist construes “real” as meaning “independent of how you, or I, or anyone believes it to be”; and as contrasting with “fictional, a figment, imaginary.” Scientific theories are real; and so are works of fiction. But the explanations scientists imagine, when they are successful, are true, and the laws they imagine real; while fictional characters and events are precisely not real, but imaginary. Though very fallibly and imperfectly, we humans are able to know something of how the world is. This is possible only because we have sense organs able to detect information about particular things around us, and the intellectual capacity to make generalizations about them; and because the things around us are of kinds and subject to laws.
We describe the world, sometimes truly, sometimes falsely. Whether a synthetic description is true or is false depends on what it says (which is a matter of human convention) and on how the things in the world it describes are. There are many different true descriptions of the world, in different vocabularies. All these many different truths must somehow fit together: there can’t be rival, incompatible truths or “knowledges.” But this doesn’t mean that all the truths about the world must fit together by being reducible to a privileged class of truths in a privileged vocabulary; I see the truths of the social sciences as “fitting together” with the truths of the natural sciences more in the way a road map can be superimposed on a contour map of the same territory.
Here’s a pdf of an interesting article by Haack, “Six signs of scientism.”