Should untested guesses be allowed as answers?

Question

An answer to the question How do I see more rivals' best time in Super Mario 3D Land? was put up for review. The answer says:

This may be like Mario Kart Wii, Your rival may be Nintendo Staff, with high scores, like a Personal Best.

That's the whole answer (At this time). I've chose to recommend deletion, as in my opinion, the answer doesn't really provide an answer to the question but rather a wild guess based on another game of the same brand (the Marion bros. brand). In my opinion it should be given as a comment, unless the answerer can verify it themselves or find a credible source to say that it's indeed the solution. As I wrote in a comment to the answerer:

If you have a real tested answer that you know that works from testing it yourself or from other credible sources, than it's an answer and you should phrase it as one, if it's only a guess based on other games with of the same brand, then it's merely a guess and should be put as a comment and not an answer.

Am I right in my "demand" for tested answers, or am I too influenced from Skeptics.SE?

Answer 1

We do not require all answers to cite a source, like Skeptics does. However, we'd rather leave guesses in the comments area.

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That said, I'd rather not moderate guesses out of the answers area at least for objective questions for a simple reason. If a guess is wrong, it's easy to try it, bust it as incorrect and downvote the answerer, punishing him for a wrong guess in the answer area. We don't moderate wrong answers.

If a guess is right, it's still helpful to the asker — plus chances are somebody who does know the answer can write a better, more quality answer that floats to the top anyway.

It is possible to exhaustively and correctly answer a question with a guess, as I might've done here. It's also known as "getting lucky." Does it really matter, then, if it was a guess in the first place?

We have had a few guess answers that sounded right, received quite a lot of upvotes and then were proved to be wrong; this (10k only) is one such example. If that happens, then please do flag away.

Answer 2

Answers should be authoritative and contain correct, factual information.

We have banned entire categories of questions (game-rec, ITG) because they didn't allow for answers that met these criteria.

Answers that contain nothing more than guesses should be downvoted at least. I personally think that, in order to help make the Internet a better place (which is kind of the mission statement here), any answers that don't provide useful new information should also be deleted. Guesses are not useful.