A useful technique from "street epistemology" is to ask a person with whom you disagree on facts this question: "what information, if it were true, would cause you to change your opinion?"
If their response, after discussion, ends up being basically "there is nothing that could change my mind," then you are wasting your time. Otherwise, you can have an interesting discussion of epistemology, objectivity, and critical thinking in general, and can learn something from one another.
If their response, after discussion, ends up being basically "there is nothing that could change my mind," then you are wasting your time. Otherwise, you can have an interesting discussion of epistemology, objectivity, and critical thinking in general, and can learn something from one another.