Today’s Daf Yomi page, Eruvin 46, contains a striking permission for a tractate so thick with rules and regulations: When in doubt about some question pertaining to an eruv, just follow the more lenient opinion. Rabbi Dovid Bashevkin returns to explain this unexpected ruling, and shed light on what's so special about an eruv that the rabbis would permit leniency as the default. How does an eruv build a community? Listen and find out.