Shmuel when saying mikrah is referring to Chumash only.
What category would Niviim and Kesuvim fall into according to Shmuel?
I recall Aggadetah earlier in Seder Nashim while discussing what constitutes an Am Haareitz; that states one who has to be koveah itim should do so based on his level.
I believe it came up in aggadatah regarding people who issue peak while only knowing Mishnah etc...
In terms of Zevulun Ben Dan.... Aggadatah (is that a reference to Medrash Rabbah Tanchuma etc...or parts of Torah shebaal peh that bring down incidents that require a Mesorah to fully understand?
Avrahom , United States
Shalom!
Your question touches on a point that is discussed at great length by many Achronim, and I will address only a small part of the topic.
1) True, Rashi says that "Mikra" refers only to Chumash, but the Rambam in Hilchos Talmud Tora 1:7 implies that Mikra includes all of Tanach.The Shulchan Aruch poskins like the Rambam (although there actually are some opinions that dispute this and say that also the Rambam holds like Rashi)
The reason that Rashi excludes Navu from Mikra s that the Gemora in Brachos 5a quotes a Pasuk that mentions "Mikra" and "Asher Kasavti" and goes on to explain that "Mikra" means Chumash and "Asher Kasavti" means Navi.
The apparent explanation of this is that only in Chumash is there a Mitzva D'Oraisa to read its words B'Tzibur (e.g. Hakheil, Parshas Zachur) and therefore it is referred to as "Mikra" (the Haftara is Takana D'Rabbonen). The Neviim were actually spoken out at the time, just that a spoken message that was essential for all generations was written down in order that it should not go lost. On the other hand, Chumash is the quintessential "Written (and therefore the quintessential read) Law"
2)The Aggadata the you are referring to is found in Sota 22a. However, your statement that "one who has to be koveah itim should do so based on his level" is not entirely precise. Every Jew neds to learn Tora on his level' from a child learning Alef Beis to the Gadol HaDor preparing a Shiur for 1000 listeners. One who learns above his level is likely to leave learning because it is too hard for him.In addition, he risks sinning with Ga'ava. One who learns below his level has obviously not realized his true potential. The Sha'arei Avoda of Rabeinu Yona states that even the Avos only served hashem according to their abilities. And the Gemora in Avoda Zarah 3a states that Hash-m only expects from a person what he is able to do (Ein HKBH Ba B'Taronia Im HaBriyos).
3) In the context of this Gemora Agadta means the Drashos and storiesthat teach Mussar (Rabba and Tanchuma for examole as you mentioned) seeing as "Halachos" are also mentioned' and "Halachos" means Medrashei HaPsukim of the various Dinim (Toras Kohanim, Sifri, etc.)
Gmar Chasima Tova'
Shimon Brodie