Turnoi, you chose to comment on my dropped comma, and ridicule me into the bargain:

"You wrote:
Watch your hyphens by the way.

Comment:
May I add my version: "Watch your hyphens, by the way".

Ian, indeed, you are an EXCELLENT teacher! "

Congratulations. You're a serious and knowledgeable teacher, you've established that. It is the opinion of other people that I'm an excellent teacher, and that's flattering, especially since the opinion is shared by my students. Oh blah blah, you dragged me in again you rascal!
Ian