There are many questions like this one:
The pattern is the same:
User (usually new one) asks a question.
Often, it's their only question on the site
Someone produces an unequivocally correct answer.
"Correct" as evidenced by one or all of the following:
Agreement between many high-rep users on chat/meta
Special formal vote on Meta
User disappears from SF&F SE forever (as evidenced by "Last seen" timestamp), without accepting the answer as correct.
More often than not, the account creation date==disappearance date.
We are left with a question with no accepted answer that nevertheless is 100% (as much as we can tell) correct, but is somewhat mis-leadingly not accepted.
Does anyone else feel that this is detrimental?
Is it desirable to have the community be able to cause "Acceptance" on such questions?
This is only intended to apply to questions where one answer is crystally clear correct, based on some fairly stringent pre-defined measure.
The exact mechanism by which this can be achieved (if it's deemed a good idea) is out of scope for this question
The question of whether this is even possible to do (if it's deemed a good idea) is out of scope for this question
The linked example question is not the absolutely best example of "100% sure that the answer is correct" - merely the first I found.