Unfortunately this is the process we have.
“Assumed Answered” is a status set by person who answered question and he think this question is correctly.
In comparison to that “Answered” is a status set by person who asked the question and this should be his confirmation the answer is correct - this may be achieved by button “Mark as correct”.
Then button “Unmark correct” appears and you can return thread to the original state marked with “?” thus it’ll be no longer ignored by other people.