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Update after rebuttal I thank the authors for a comprehensive rebuttal and extra experiments. It has addressed most of my concerns, and I have updated my score. The authors should make sure to properly tone down the claims about improved training for LDA (vs. It seems to me that we do not really understand very well what is happening in these models at this stage; this perplexity experiment is just scratching the surface (and should be presented as such). I am also a bit puzzled by the use of alpha 1.001 (vs.