Eruvin 82a

עירובין פ״ב ע״א

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Topic

Whether רבי יהודה's "אימתי" explains or disputes; the shared עירוב תחומין, its purpose and timing (ברירה); and which child is covered by his mother's עירוב

Overview

This amud first settles a contradiction from the previous discussion: שמואל and רבי יהושע בן לוי are two different אמוראים, so they may simply disagree. The גמרא then examines רבי יהושע בן לוי's rule that רבי יהודה's "אימתי" and "במה" always explain the חכמים. רבי יוחנן says "אימתי" explains but "במה" disagrees. The גמרא challenges "אימתי" from the case of disqualified witnesses, where a ברייתא has the חכמים disqualify a gambler even if he has another job. It answers that this strict view follows רבי יהודה in the name of רבי טרפון, who holds that a commitment made in doubt is not real, as in the case of an uncertain נזירות. That makes a gambler's winnings like stolen money. After the הדרן closing פרק חלון, a new משנה teaches how one person makes an עירוב תחומין for the whole town, and that each person must accept it before nightfall. The גמרא brings רב יוסף's rule that such an עירוב is only for a מצוה, and רב אשי's reading that 'while still day' is about being informed, so the משנה does not prove אין ברירה. Finally, רב אסי rules that a six-year-old goes out with his mother's עירוב. A ברייתא ties this to whether the child still needs his mother, which the גמרא defines and dates to about age four or five, setting up a challenge to רב אסי that continues on the next amud.

Opening lines

The steps (27)

1. ResolutionTwo different אמוראים may simply disagree
2. Statementרבי יהושע בן לוי's rule for "when" and "in what case"
3. Statementרבי יוחנן splits the two phrases
4. ChallengeChallenge: a משנה about disqualified witnesses
5. Challengeרבי יהודה's "when" in that Mishna
6. ChallengeA ברייתא shows the חכמים disqualifying a gambler in every case
7. ResolutionThe ברייתא follows רבי יהודה's teaching in the name of רבי טרפון
8. Proofרבי טרפון's teaching: an uncertain נזירות does not take effect
9. ProofThe shared logic: no full commitment when the outcome is uncertain
10. ConclusionHadran — Closing פרק חלון
11. StatementHow to make a shared עירוב תחומין for the whole town
12. StatementAccepting the עירוב must happen before nightfall
13. Statementרב יוסף: עירוב תחומין only for a מצוה
14. ChallengeWhy does רב יוסף need to say this?
15. ResolutionThe משנה may only describe the usual case
16. ProofDoes the משנה's phrase prove there is no ברירה?
17. Rejectionרב אשי: The משנה is about being informed, not deciding
18. Statementרב אסי: A six-year-old is included in his mother's עירוב
19. ChallengeA ברייתא ties the rule to whether the child needs his mother
20. ChallengeA parallel משנה about סוכה uses the same test
21. QuestionWhich child no longer needs his mother?
22. ResponseFirst definition: he cleans himself
23. ResponseSecond definition: he does not call for his mother
24. ChallengeEven older children call their mother
25. ResolutionHe means calling 'Mother, Mother' again and again
26. QuestionAt what age does this usually happen?
27. ResponseAbout four or five years old