hinter now provides hints based on the mistake made for each dummy answer submission. After correct answer event takes place the incorrect answers and the hints provided for each one appear (up to 4 currently). Clicking on their orange box area will add 1 to the hint's rating for the respective answer, or you can submit your own hint (which will default to being under the first incorrect answer). Effectively you can only vote once, although it's not programmed to necessarily be so. sorry for long commit comment.