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Is training a child to fast on Yom Kippur merely practice for adulthood, or does a katan have a rabbinic obligation in the mitzvah (מצוה) itself? The shiur analyzes the machloket between Rav Yochanan, Rav Huna, and Rav Chisda on whether sho'os (partial fasting) and hashlama (completing the fast) constitute chinuch d'Rabanan or simple preparation. The distinction reshapes when one must physically stop a child from eating and whether other inuyim apply.
This shiur explores a fundamental sugya in Yoma 82a concerning the obligation to train children (katanïm) to fast on Yom Kippur. The Gemara (גמרא) presents three opinions: Rav Chisda holds three years of training for a healthy child (bari) and two for a weak child (chola); Rav Huna holds two and two respectively; and Rav Yochanan holds that there is no rabbinic obligation of hashlama (completing the fast) at all—only sho'os (partial fasting) as preparation. Rabbi Zweig begins by framing the core question: What is the nature of this machloket? Is it a dispute about medical capacity—whether a child can physically handle fasting at certain ages—or is it a halachic dispute about the nature of chinuch (education in mitzvos)? He argues emphatically that the Amoraim cannot be disagreeing about medical facts; rather, they dispute the legal status of a katan's fasting.
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Yoma 82a
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