Commentary for Kiddushin 87:12

Perhaps R. Judah agrees with R. Shimon about the issue of detailed enumeration—whether one must enumerate each issue for it to have legal significance. However, R. Judah does not require him to say “oath” to each person. We can see easily that R. Judah actually disagrees with R. Shimon on this very issue. So our whole mishnah cannot be R. Judah, and if the second half is not R. Judah, the first half cannot be his opinion.