6244b2ba957c48bc64582cf2bcec3d04-AuthorFeedback.pdf

We thank all reviewers for their critical comments and we address some questions below. Y es, we have tried the two-stage approach in our initial study. Similar as what many existing works reported [e.g. 1, MGDA is more robust and parameter-free. We did not perform statistical test since some baselines only used the default train/test split on MNIST. Our setup here also comply with existing works [e.g. 1, 5, 16, 34, 38, 39, 51, 52].