The answer is "no" because you can't guess the answer. You can guess an answer, but the article the implies that there is a single right answer, which there isn't.

Also, xxxmidnaxxx, the answer isn't "nothing."

Can you guess the answer to the riddle?
Nothing.

That doesn't even makes sense. The answer "nothing" is the answer to a different riddle. The one about "The poor have it, the rich need it, if you eat it you'll die, ect....."

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Dear shadow alive and well
How can the body die
You tell me everything
Anything true