 According to possibilism (perhaps extended to allow some fictional objects to be impossible objects), fictional objects are just like actual objects, except that they exist only in various non-actual worlds. Like actual objects, they are determinate down to the last detail in worlds in which they exist (so long as the stories that characterize them represent the world as being determinate down to the last detail). This is so even if the stories do not themselves fill in these details. For example, in worlds in which the Holmes stories are true, Holmes is left-handed, right-handed, or ambidextrous, even though the stories themselves do not tell us which (all that is true in the Holmes stories is that, having hands, he is one of these).