I am confused about the "main moderator." When pg says "main moderator" is he referring to a specifc person other than himself, himself in the third person or a

I am confused about the "main moderator." When pg says "main moderator" is he referring to a specifc person other than himself, himself in the third person or a functional role (possibly rotating like "pager duty")? Elsewhere in this discussion he says "IIRC that name was chosen by the moderator, but it will be easy enough for him to change if he wants." The first mention of endorsing comments I can find is in pg's initial announcement of the pending comments change.