Obligations of Bedikah: When Must We Investigate a Safek?

This shiur examines the fundamental question of when Jewish law requires active investigation (bedikah) rather than relying on halachic presumptions like rov (majority) or safek safeka (double doubt). The discussion centers on a dispute between the Rashba, who holds there is an obligation to investigate in cases of safek safeka, and the Trumas HaDeshen, who disagrees. The Noda B'Yehuda attempts to resolve this by distinguishing cases where there is a chezkas issur (presumption of prohibition) from those with chezkas heter (presumption of permission). Rabbi Zweig develops a novel approach through analyzing Rashi (רש"י)'s commentary. He suggests that the obligation to investigate applies differently depending on whether the prohibited action can be delayed. For example, with food that could spoil, eating today versus tomorrow represents the same essential use, so one should wait and investigate first. However, with clothing or living arrangements, each day's use is distinct and irreplaceable - today's wearing cannot be done tomorrow, today's living cannot be postponed.