More particularly it explores the 'paradox' that we feel emotion at all for fictional characters given that they do not exist. Colin Radford has written on this subject a paper called 'The Fate of Anna Karenina', and he has been attacked extensively for his views on aesthetic emotion. However, I do not think he is mistaken in his conclusion, that the fact that we have emotions for fictional characters is natural and a brute fact about human nature. But he is mistaken in his preceding argument. Beliefs about non-existent objects are false.
False beliefs are irrational.
He says that this involves irrationality. But if our feelings are part of human nature then they may be without reason but not irrational. His reasoning for this conclusion involves an analogy with real events which is unsuccessful. The 'paradox' disappears if we reformulate Radford's argument. Tolstoy, L. Anna Karenina Wittgenstein, L. Note Books 1914-16 edited GH Von Wright, University of Chicago Press.