איפכא איבעי ליה למיתני!
It should teach the opposite, i.e., it should say: They made one who engages in the initial stage of sex like one who completes the act, as it is obvious that one who completes the act is liable.
Study Keritot folio 11B with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
איפכא איבעי ליה למיתני!
It should teach the opposite, i.e., it should say: They made one who engages in the initial stage of sex like one who completes the act, as it is obvious that one who completes the act is liable.
אמר ליה: איסמייה? אמר ליה: לא, הכי קתני: עשו גומר שלא כדרכה בשפחה חרופה, דלא מיחייבי, כמערה כדרכה, ד״שכבת זרע״ כתיב.
The tanna said to Rav Sheshet: Should I remove this baraita, as it is apparently corrupted? Rav Sheshet said to him: No; do not remove the baraita, as this is what it is teaching: The rabbis rendered one who completes an atypical act of sex with an espoused female slave, for which he is not liable, like one who engages in the initial stage of sex with her in the typical manner, for which he is also exempt. They derived this from the fact that it is written: “Lies carnally.”
מתכוין שלא כדרכה בשפחה, דפטורין כאינו מתכוין, ד״שכבת זרע״ כתיב. ניעור שלא כדרכה בשפחה, דפטורין כישן, מאי טעמא? ד״שכבת זרע״ כתיב.
Similarly, they rendered one who engages intentionally in atypical sex with a female slave, for which they are both exempt, like one who does so in a typical manner unintentionally, as it is written: “Lies carnally.” And they also rendered one who has sex in an atypical manner with an espoused female slave while he is awake, for which they are both exempt, like one who does so while sleeping. What is the reason? They derived this from the fact that it is written: “Lies carnally.”
נמצא מתכוין והמערה בשפחה, כשאין מתכוין בכל עריות. ישן כדרכה – כישן דעריות, נמצא ניעור שלא כדרכה בשפחה – כישן דכל עריות.
The Talmud concludes: It has been determined that one who has sex intentionally or engages in the initial stage of sex with an espoused female slave is like one who does so unintentionally with all those with whom sex are forbidden, meaning that he is exempt. Similarly, one who has sex with an espoused female slave in a typical manner while sleeping is like one who does so, while sleeping, with all those others with whom sex are forbidden, and he is likewise exempt. Furthermore, it has also been determined that one who engages in atypical sex with an espoused female slave while awake is like one who does so with all those with whom sex are forbidden, while sleeping, and he is also exempt.
Text data via Sefaria: William Davidson Edition - English and William Davidson Edition - Vocalized Aramaic, CC-BY-NC; edition provenance: Koren. Display terminology has been modernized for readability.