Many of the people I know that believe odd things do use reason, but they only accept certain things as facts and discard other things as dysfactual. Sometimes

Many of the people I know that believe odd things do use reason, but they only accept certain things as facts and discard other things as dysfactual. Sometimes the things they accept is facts are merely delusions, of course, but that doesn't mean they don't reason. It just means that their reason is based on delusions. Otoh, I also have met a number of people that when you ask "because why" freeze up as they simply have no basis at all and don't understand themselves why they came to hold a position. And we can't forget that wood and witches are the only things that float because Science.