Level IV, known as a peritum, is the fourth rank in Loricism. Level IV has a more established mastery of the principles of Loricism, and are more skilled at teaching and facilitating praxi. The Peritum (expert) can certify up to Opifex, and must spend at least 400 hours at Peritum before promoting to Praeceptor. Level IV practitioners are well-versed in rhetoric, debate, and all varieties of interpersonal communication. They have internalized the art of recognizing and countering logical fallacies and various rhetorical devices, and are more attuned to helping lower ranks identify problem areas and solutions. They must be skilled enough to teach others to teach Loricism. Students are awarded a dark red shirt for Level The color for this rank is dark green, and students are typically awarded a dark green shirt for Level IV.