Commentary for Avodah Zarah 52:11
איפוך ר"מ אומר ימול כותי ולא עובד כוכבים ר' יהודה אומר עובד כוכבים ולא כותי
Reverse [the names]: R. Meir says that the Samaritan and not the non-Jew can circumcise, and R. Judah says the non-Jew and not the Samaritan.
Daf Shevui to Avodah Zarah
The Talmud solves the problem by reversing the positions in the baraita—now R. Meir holds that a non-Jew cannot circumcise. This is a trick the Talmud pulls occasionally. It usually leads to subsequent problems.
Ask RabbiBookmarkShareCopy