Rashi on Moed Katan
My teacher Prof. Neil Danzig, in his comment to this post, reminded me that Rashi’s commentary to Moed Katan that is found in the standard editions of the Talmud is not Rashi’s. Whether Rashi ever wrote a commentary to Moed Katan is subject to some disagreement among scholars. See here (Hebrew) for a discussion on Rashi’s commentary to the Talmud by Avraham Grossman. I am posting below Mayer Gruber’s comments on this question from his excellent introduction to Rashi’s Commentary on Psalms
