Last year, there was an entry on my blog with comments from readers about indeterminacies in fiction: “The Quantificational Force of Fiction Operators”. Check it out.

Inconsistencies in fictions and elsewhere are discussed in:

• Varzi, Achille: 1997. “Inconsistency Without Contradiction”. Notre Dame Journal of Formal Logic, 38(4), 621—638. preprint.

See also:

• Lewis, David: 1982. “Logic for Equivocators”. Noûs 16, 431—441. Reprinted in David Lewis: 1998. Papers in Philosophical Logic. Cambridge University Press, pp. 97—110.

The Varzi and Lewis papers are for the very curious and/or philosophically-minded.