1. Two stones achieve cleansing at the normal exit: sufficient in the Hanafi view, but al-Shafi‘i still requires the minimum three wipes.
2. Dry cleansing succeeds and the area is then washed with water: the more complete, preferred method.
3. Filth extends beyond the exit: the rule depends on the degree of spread and the juristic position on washing.
4. Food or bone is used for dry cleansing: the implement itself is prohibited even if some filth is physically removed.