Each source has a credibility ranging from LSOS to the Word of God. Some organizations have numeric values for credibility. We think credibility is more subtle than that, varying on the subject to the time of the month. Key trade craft is evaluating credibility. Basic cause of ulcers in the profession. Meeting someone face to face does not increase your ability to judge credibility. Depending on glandular issues, it can decrease critical faculties dramatically. Intelligence would be great if it didn’t involve people.