@article{theimpgamelearnabilityapproximabilityand,
  title = {The IMP game: Learnability, approximability and adversarial learning beyond $Σ^0_1$},
  author = {Michael Brand and David L. Dowe},
  year = {2016},
  eprint = {1602.02743},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1602.02743v1},
}