Half the Mishnah was never argued

Claim (verbatim)

The Mishnah is built of six orders and sixty-three tractates, but the Babylonian Talmud - the text that made the Mishnah into "the Talmud" - supplies gemara on only about thirty-seven of them. Whole orders go undeveloped: nearly all of Zeraim (only Berakhot has Bavli gemara) and nearly all of Tohorot (only Niddah). The standard account is institutional and geographic: these tractates govern agricultural law binding only in the Land of Israel, or Temple-era purities, and so drew no sustained Babylonian analysis. Whatever the cause, the consequence for the literary record is stark and structural: for well over a third of the Mishnah the vast interpretive apparatus that preserves, expands and transmits rabbinic law simply does not exist, and the Mishnah's text in those orders survives far more thinly commented, copied and studied than the tractates the Talmud took up. Mechanism: the gemara is the engine of recopying and study, and where it is absent its tractates coast on the Mishnah alone and on scattered commentary, a permanently thinner stratum. Prediction restated: counting which Mishnah tractates carry Babylonian gemara in Sefaria, the missing gemara concentrates almost entirely in the orders Zeraim and Tohorot, so those two orders together account for the large majority of the gemara-less tractates.

Prediction clause (verbatim)

Prediction: tabulating, for each of the Mishnah's 63 tractates, whether Sefaria carries a Babylonian gemara, the count with gemara will be under 40 and the gemara-less tractates will fall overwhelmingly (> 0.7 of them) inside the two orders Zeraim and Tohorot - primary clause: the > 0.7 Zeraim-plus-Tohorot share among gemara-less tractates; the verdict follows it. Berakhot (in Zeraim) and Niddah (in Tohorot) are counted as the known exceptions that carry gemara; the test resolves directly from Sefaria's table of contents and voids only if tractate boundaries cannot be read.

Kill-dataset (verbatim)

Kill: Sefaria's Mishnah and Babylonian Talmud tables of contents - for each Mishnaic tractate, test for the presence of a Bavli gemara layer and cross-tabulate the absences against Mishnaic order.

Novelty / leakage triage

already answered in the literature

The gemara census is stated and tabulated in every introduction to rabbinic literature: the Bavli carries gemara on roughly 36.5-37 of the Mishnah's 63 tractates, lacking all of Zeraim except Berakhot, all of Tohorot except Niddah, plus Shekalim, Eduyot, Avot, Middot and Kinnim (Tamid partial) - Strack-Stemberger prints exactly this enumeration, as did Epstein's prolegomena before it. Both clauses resolve by direct arithmetic on that printed table: under 40 with gemara, and the gemara-less set falling 21 of 26-27 (about 0.78-0.81, > 0.7) in Zeraim plus Tohorot. Reading Sefaria's table of contents re-derives a textbook page; the answer is wholly in print.

• H. L. Strack & G. Stemberger, Introduction to the Talmud and Midrash (2nd ed., 1996), chapter on the Babylonian Talmud (enumeration of tractates with and without gemara)
• J. N. Epstein, Mevo'ot le-Sifrut ha-Amoraim (Jerusalem, 1962)

Predictions

No prediction registered yet.