Bro. First off, that was a complete troll post. I wish you could've seen the chat in the group, it was basically the heads of the group telling the guy who posted the riddle that he was stupid and screwed up. Second, the answer was nothing, as in nothing. You guessed empty space in your inventory. The answer was nothing, in general. Not even close to the same thing. Don't go trashing the group because one guy made a troll riddle, and because you had a close guess but didn't get it right.