Some accepted answers do not have a valid accept-vote in Votes table, even though the question owner still exists. Stack Overflow alone has over 2000 such answers. A recent example is Sub query for column name:

  • The timeline says that the answer was unaccepted on July 3, 2014.
  • However, it still has the green checkmark
  • However, the checkmark does not show acceptance time on hover.

Is the answer accepted or not? Is it some kind of Schrödinger's acceptance?


1 Answer 1


Looks like the serial voting reversal process got too greedy and removed the raw accept vote along with "real" upvotes:

Most likely a bug when there are invalid upvotes on an accepted answer.

This gets more serious for this user:

  • Aha, so my query detects serial upvoters? Presumably the question owner took part in serial voting, why else would acceptance be invalidated... Hmm. By the way, if you view second user's rep changes sorted by post, you'll see -555 6 events > but clicking the expand arrow says "no net reputation changes". Yet another bug.
    – user259867
    Aug 22, 2014 at 23:14
  • I edited the query to include the user who asked the question. An interesting list, with a lot of repetition. Not all of these are serial voters, though: sometimes the accepted answer is by question owner, and it seems in this case no accept-vote is recorded.
    – user259867
    Aug 22, 2014 at 23:24
  • @900 guess only a dev can know for sure, but looks like you stumbled into a bug of some sort, yeah. :) Aug 22, 2014 at 23:38