The earlier rule grants a return option, not an automatic discount. The later clause permits arsh because subsequent buyer-side damage blocks unilateral return.
1. Earlier defect, return possible: primary right of return.
2. Earlier defect plus new damage: compensation may be due.
3. Seller consents to receive the newly damaged item: return can be allowed.
Arsh is not an unrestricted unilateral discount in every defective sale.