(Mishnah): If one makes one stitch, it is not considered attached and there is no prohibition of Kilayim; and one who pulls it out on Shabbos is exempt.

If one made a thread's two ends come out on the same side, it's considered attached and there is a prohibition of Kilayim; and one who pulls it out on Shabbos is liable.

(R. Yehuda): Only when he makes three stitches.

A sack and a box combine to make Kilayim (if one has a strip of wool attached to it and the other has a strip of linen, and they are connected via the two strips).

(Gemara) (R. Chaninah): When the Mishnah taught that two stitches makes a connection, it's only if he pulled the other side fully through.

Question (R. Yannai): They asked R. Chanina to stick to expounding pesukim, but not Mishnah. The Mishnah's wording implies that two stitches are always a connection (even if he didn't pull it fully through)...?

Similarly, when R. Yehuda said in the Mishnah that it's only when he makes three stitches, that also implies that it's a connection even if he didn't pull it fully through...?

If one threaded a needle, even if the ends of the thread were tied (to prevent the needle from falling out), and then inserted the needle into a garment, the thread is not considered attached, as the thread must be attached to the garment itself, not via the needle.

(R. Yona and R. Yosa): (When the Mishnah taught that one made a thread's two ends come out on the same side) it's referring to when he tied each end of the thread (to prevent it from coming out).

The Rabbis disagree, as R. Ba said from R. Yirmiyah in the name of Rav - 'One who pulls taut a seam that became loose (by pulling the thread to reconnect the two pieces of fabric) is liable for the Melacha of sewing.' Why didn't he also say for the Melacha of tying (since one is only liable for sewing if he also tied)?

(R. Simon): (R. Yehuda said in the Mishnah that it's only considered attached when he made three stitches.) R. Yehuda reasons that it will not last without having a third stitch.

Question: Does R. Yehuda follow R. Eliezer who said in a Mishnah (in Maseches Shabbos 13:1) - one who weaves three threads at the beginning (to start a new weave) or one thread to an existing weave, he is liable...?

Answer (R. Ulla): No, R. Eliezer reasons there that through three, the weave will remain in place (which is a requirement for any Shabbos Melacha). (R. Yehuda could disagree with this.) Here (in Kilayim), R. Yehuda reasons it does not become attached with less than three stitches.

(The Mishnah taught that a sack and a box combine to make Kilayim (if one has a strip of wool attached to it and the other has a strip of linen, and they are connected via the two strips).) The Mishnah taught specifically that sack combines with a box, but sack does not combine with a basket.

However, a Baraisa was found that teaches that a basket, sack and a box combine in Kilayim.

Baraisa: There is no prohibition of Kilayim in tents (as they are not worn).

Question (R. Yirmiyah): Do a father and son combine for the prohibition of Kilayim?

What's the case? When the father is wearing wool and the son is wearing linen and their garments were attached with two stitches and a wool belt was then put around both of them - since they are two separate people, there is no prohibition.

(R. Yosi): Could the wool and linen be considered connected? (They aren't 'biting' into each other!)

Question (R. Chagai): Can a person himself be the way that Kilayim combines?

What's the case? If he wears a wool shoe on one foot and a linen shoe on the other.

(R. Yosi): Could they be considered connected?!

Rather, it's when a person put a wool bandage on one wound on his head and a linen bandage on another wound.

(R. Yosi): Could they be considered connected?! The prohibition is only when they are actually attached in a way that they 'bite' into each other.