 There is a further concern about the apparatus Walton employs, one that also affects Lewis’s account. To apply the above rules of generation, we need to be able to determine a work’s primary fictional truths, those that are evident in the work or, in Lewis’s terms, those that are part of what is told as “known fact”. These present no trouble if we have a reliable narrator, but what if the narrator is unreliable? With Lewis as his focus, Currie imagines a situation in which the Holmes stories are written in a “tone of understatement and irony”, so that Holmes appears only somewhat successful even though in the story he is “spectacularly successful” (Currie 1990: 70). Given that the worlds to be considered are worlds in which the story is told as known fact, the worry is that, for Lewis, Holmes is only somewhat successful in the stories. Walton’s answer to this kind of problem is to allow free rein to the kind of pragmatic interpretive moves that are used in ordinary communicative exchanges (see Walton 1990: ch. 4). If there is evidence of understatement and irony, we should make allowances for that when determining what is true. Lewis has a broadly similar answer. In a footnote Lewis points out that there are all kinds of ways of telling stories. Storytellers may present themselves as quite unreliable (mad, naïve, etc.), or as translators of some work rather than the person who wrote it, and so on. He adds that 