 በሤራና በሸፍጥ የተወሰነ ድል ለተወሰነ ጊዜ መጎናጸፍ ይቻል ይሆናል እንጂ መጨረሻው እንደማያምር በታሪክ የተረጋገጠ ጉዳይ ነው።
The 20% test creates a presumption that a partial termination has taken place, but facts and circumstances can be used to show that a partial termination, in fact, has not occurred.