Hello, What conjecture and hearsay? Chang Dojunim has not been in touch with anyone that knows him in Korean in years. Where is he teaching? He had a large commercial Dojang for years, and has not taught at the UN for quite some time. I have had the honor of meeting and speaking to him, and my instructor was the MC at the ceremony where he was publicly named Dojunim. Who are you speaking to? Your entire post is simply hearsay otherwise. The wiki article is incorrect - no 10th Dan has ever been issued, and I have seen the dojunim certificate and it does not indicate such a numerical rank.