This seems to be a very difficult, subjective question in determining how hard is too hard.
I created a quiz where every answer begins with either H,A,R, or D - answers are grouped by letter, so players always know what letter the answer starts with.
I also wanted to make the quiz fairly difficult, but not impossible. But therein lies the issue. For veteran Sporclers, many of the questions probably wouldn't be too difficult at all. However, for a casual player, they might be very difficult. Looking at the results, it looks like more than half of players are getting less than 50%. For a quiz that is
supposed to be "hard", I'm not sure if this is a good thing or not. So far the ratings have been decent, but I haven't had many comments regarding difficulty. I'd like to see if some of you folks could take a look and let me know if I should replace some of the more difficult answers. Although, I find it difficult to believe that more people aren't getting the Edgar Allen Poe question - my wife thought that one should be one of the easier ones.
http://www.sporcle.com/games/brimtown/the-hard-quiz