Subject: Re: Biden VS Trump: What A Difference!
LurkerMom: Yep, Biden received the nickname professor...

No, he did not, and it's right there in your own linked article: "Biden’s official title was the Benjamin Franklin Presidential Practice Professor..."

OFFICIAL TITLE, not nickname. - CO

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Of course it is not a nickname, that is what makes LM's comment funny.

You really don't have a sense of humor, do you?