Extended Data Table 3 Downdating Athenian decrees with Ithaca

From: Restoring and attributing ancient texts using deep neural networks

  1. List of disputed Classical Athenian decrees (including their IG3 edition number), their dates as listed in PHI (which follow the conventional dates proposed by Meiggs - Lewis 1969103 and correspond to the dates in the IG3 editions of the decrees) based on the conventional ‘three-bar-sigma’ dating criterion, and their recent dating re-evaluations28. Ithaca’s prediction mean is listed in column 5. The last two columns represent the distance (in years) of the PHI dates and Ithaca’s predictions from the recent dating re-evaluations. The colour intensity reflects the distance in years, with stronger intensity reflecting a farther distance. As can be seen, Ithaca’s predictions result in an average distance of 5 years, which is 22 years closer to the re-evaluated dates, compared to PHI’s conventional dates.
  2. PHI IDs of the inscriptions excluded from training: 10, 11, 14, 17, 18, 19, 27, 28, 32, 34, 37, 39, 40, 41, 42, 46, 1682; additional PHI IDs for new editions, newly discovered or published sections and doubles of the decrees: 293752, 294468, 229647, 291317, 232697, 293754, 1675, 1676, 1677, 1678, 1679, 1680, 1681, 291118, 292366, 291960, 346490, 292187, 291318, 291321, 292189, 293756, 232710, 291322, 293327, 292194.
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