1. Department of Philosophy, Stockholm University, SE - 10691, Stockholm Sweden and University of Johannesburg, South Africa1
2. Department of Mathematics and Statistics, FI-00014 University of Helsinki, Helsinki Finland and Computing Sciences Unit, FI-33100 Tampere University, Tampere Finland
3. Computing Sciences Unit, FI-33100 Tampere University, Tampere Finland and Université Paris-Saclay, 4 avenue des Sciences, 91190 Gif-sur-Yvette France