User blog comment:Alejandro Magno/Extension of the Alphabet Hierarchy/@comment-10429372-20141007155537/@comment-4224897-20141007222554

http://googology.wikia.com/wiki/User_blog:Wythagoras/My_well-definedness-grades

As Wyth said, a C- is very generous for this extension, and I'm sorry but honestly the grade would be closer to D+.