We have one relatively newbie teacher in our area who refers to themselves as "Master" and wants to be formally addressed as such. Your thoughts? Some of the most accomplished masters I've encountered never refer to themselves as such, but others refer to them respectfully as Sensei, Sifu, or Master. I'm starting to wonder if seeing a self-titled "Master" teacher should raise skepticism. Thoughts? Anyone encounter a "master" and call them something else or call them out?