@misc{indiciae57d8fe548604,
  title = {A note on formal learning theory.},
  author = {D N Osherson and S Weinstein},
  year = {1982},
  doi = {10.1016/0010-0277(82)90005-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/7198953/},
  note = {Source identifier: 7198953}
}