@article{conditioningondisjunctiveknowledge,
  title = {Conditioning on Disjunctive Knowledge: Defaults and Probabilities},
  author = {Eric Neufeld and J. D. Horton},
  year = {2013},
  eprint = {1304.1521},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1304.1521v1},
}