Shabbat 91: Carrying Is Never Just Carrying

Purpose and intent, when it comes to carrying tiny amounts. And how that differs across people, and across plans, which change. Plus: Lining up the opinions of the mishnah. Also: what happens when the act of carrying even this tiny amount is not completed? And what happens when one person completes the plan of another - can we really transfer intent? And if so, how far does that principle go? Finally, when changing your mind doesn't change your obligation.