Daf Notes is currently being dedicated to the neshamah of Tzvi Gershon Ben Yoel (Harvey Felsen) o”h   The Gemora cites a braisa: The laws of negaim (tzaraas) and oholos (corpse tumah transmitted by means of a roof) have few Scriptural allusions, but many halachos.   The Gemora asks: Aren’t there many Scriptural passages regarding…