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Does *sirtut* (ruled lines for writing) mean one line at the top of a page, or must every line be ruled? The shiur examines the fundamental dispute between Rabbeinu Tam (who distinguishes between Sefer Torah (תורה) and *kisvei hakodesh*) and the Rambam (רמב"ם) (who applies a uniform standard). The tension between the Gemara (גמרא) in Gittin and Menachos drives the analysis of what makes *tefillin*, *mezuzah*, and *megillah* require—or not require—*sirtut*.
This shiur is a deep, multi-layered analysis of the halakhic requirement of *sirtut*—the practice of ruling lines on parchment before writing sacred texts. Rabbi Zweig examines the foundational Gemara (גמרא) in Gittin 6a and its related passages, especially the Gemara in Menachos, focusing on a series of unresolved contradictions in Rabbeinu Tam and the Rambam (רמב"ם). Rabbi Zweig opens by stating Rabbeinu Tam's position: the *sirtut* mentioned in the Gemara in Gittin refers to a single line at the top of the page, whereas the *sirtut* for *tefillin* and *mezuzah* refers to ruling every single line. Rabbeinu Tam's distinction is based on the level of the scribe's expertise: a *sofer* who cannot write beautifully (*yafeh*) without ruled lines is obligated to rule every line (*kol shur v'shur*). However, Rabbi Zweig raises a powerful question: if this is true, why didn't the Gemara in Menachos answer its own question—that *tefillin* written with *sirtut* cannot be used for a *mezuzah* because of *ein moridim* (the prohibition of downgrading sacred objects)—by simply stating that *mezuzah* requires *sirtut*? Instead, the Gemara answers that the *braisa* follows the view that a *mezuzah* does not require *sirtut*. This suggests that Rabbeinu Tam's approach creates an internal inconsistency.
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Gittin 6a
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