Do invalid s'chach less than four tefachim and adjacent open space less than three tefachim combine to invalidate a sukkah?

May someone take the three steps backward to the side rather than directly backward, if space is constrained behind them?

Priestly Blessing

Do all four tzitzit on a garment's corners interdepend such that the absence or invalidity of one invalidates the entire mitzvah?

When to Wear Tzitzit

Does a hole in a vessel invalidate it for netilat yadayim, and what is the threshold hole size?

Drying Hands After Washing

Does distraction of the mind (hesech hada'at) invalidate intermediate handwashing?

Conduct During Meals

Can three who came from three separate groups (each of which made zimun) combine to make a new zimun?

Zimmun of Ten

When three people eat together and one eats gentile bread (pat akum) while the others do not, may they combine for zimun?

Birkat HaMazon — Further Laws