I don't think they are a valid source of knowledge at all, in fact, I don't think you can gain any knowledge from them what so ever. What I think they are good for is interrupting data. Intuition is just processing data quickly, and for it to be accurate you need to already be knowledgeable of a subject. If you lack the knowledge on a subject then intuition is worthless.

Emotions are the same, and don't provide new information at all. The emotions are based off our past experiences with things, and we try to judge things based off that experiences. Which is why so many people have irrational fears, because at some point something happened that seemed bad to them, and that past experience colors their emotions towards things that are similar. Those emotions are only as good as the initial experience however and if you face something totally new and original your emotions are not going to be useful for figuring out that new situation. The only time they are useful, is if the new situation is similar to an old one you experienced.

So no, I don't think either are a useful source of information or knowledge. They provide no knowledge what so ever, and they are only as good at the information you already have. If you got bad information they are going to give bad results.