Bava Batra 40 - August 4, 29 Tamuz
What other actions require the presence of two people and which require three? In the context of this discussion, the Gemara elaborates on the laws of moda'a, a preemptive declaration. Rav Yehuda ruled that a document gift that is "hidden" is not effective. Why? Can it be used as a preemptive declaration?