forum for week of Nov 7: kinds of apriori beliefs

I believe feeling threat could be one example of an a priori which is neither mathematics nor meaning of words. When impending danger is near, most people are able to detect it without any foreknowledge. For example, you may have heard of a person talking about how they knew "something was just wrong" or felt like "something bad was about to happen" after a tragedy or an unfortunate incident occurring. Sometimes people go out of their way to react to the feeling of threat although there may be no substantial evidence to prove that there are actually any threatening factors around them just to have the threat confirmed afterwards. However, I understand that there are exceptions to this, such as mere paranoia when everything may seem like a threat when it is not and having (bad) luck play a role in whether what they expected ends up happening afterall.