Reviews: Multiclass Learning from Contradictions

All the reviewers tend to agree that the paper provides solid technical contributions in the area of universum learning for multi-class SVMs. I am happy to recommend that it is accepted for publication at NeurIPS2019. Nevertheless, there is a great concern on the quality of writing. I therefore urge the authors to keep improving the quality of writing (in terms of both grammar and mathematical accuracy) of the camera-ready version. While the supplementary material is less important than the main paper, the clarity of the proofs presented there play an important role for unfamiliar readers in understanding the major contributions of this work.