 Chaos raises a number of questions about scientific realism (see scientific realism)  only some of which will be touched on here. First and foremost, scientific realism is usually formulated as a thesis about the status of unobservable terms in scientific theories and their relationship to entities, events and processes in the actual world. In other words, theories make various claims about features of the world and these claims are at least approximately true. But as we saw in  §2,  there are serious questions about formulating a theory of chaos, let alone determining how this theory fares under scientific realism. It seems more reasonable, then, to discuss some less ambitious realist questions regarding chaos: Is chaos an actual phenomenon? Do the various denizens of chaos, like fractals, actually exist? 