My question is why would you release the answers to the riddles in the game? The riddles are a fun part of figuring out the game and I suggest that you put on this thread [SPOILER], use the edit button.
Well, I don't know about you, but my native language and culture is not English, and it's not always easy to figure out a riddle in a foreign language
Like the word "vat", I had no idea what it ment, so I had to look it up to even understand the question.
And the river bed thing - we don't talk about "river beds" in my language, so that part is foreign to me.