פירוש על עבודה זרה 74:12

The Talmud points out that the rule for when we rule strictly in cases of impurity in the public domain is learned from the sotah, the woman suspected of adultery. We take these suspicions seriously only when she may have been defiled (had adultery) in the private domain. So too when it comes to doubtful cases of defilement, they are ruled impure only the potential contact occurred in the private domain. Thus we have here the same problem we had before. Yose b. Yoezer’s ruling is the same as the law agreed to by everyone. How then is he a “permitter?”