Mr. Logical and Mr. Dramatic

We had another run-in with Mr. Logical and Mr. Dramatic.  It always goes something like this...David (Mr. Dramatic) embellishes a story or makes a claim that stretches the truth just a bit or even just expresses his understanding of the world that is usually 99% right but has 1% that is not quite accurate.  AJ (Mr. Logical) quickly gets agitated at the misstatement and has patience for about ten seconds that it must be corrected.  David digs in his heels and either repeats his claim louder and more vehemently (a technique I have seen used at the Italian/Lithuanian/Polish dinner table with Joe's family many times) or embellishes further for greater impact and AJ completely loses it, usually resulting in shouted insults or brotherly violence or both.  The latest episode went like this:

(Backstory: AJ is learning how to read and has been reading us all a book each night, the latest of which was a Dr. Suess book with the word Mississippi, which he very proudly was able to read correctly the night before.  David definitely took note of the praise Joe and I gave AJ.)
David at breakfast: "AJ, you are becoming a very good reader.  I can read, too!  I can even read Mississippi!"
AJ: "What are you talking about, David?!?  You didn't read Mississippi!  I read Mississippi!"
David: "No, really, AJ, I. CAN. READ. MISSISSIPPI!" (Note how he got louder and more vehement to prove his point.)
AJ: "No, you can't even read at all.  I am in kindergarten, and that is when you learn how to read.  You are still in preschool!"
David: "YOU ARE WRONG!  I CAN READ MISSISSIPPI!  SEE!?!" (at this point, David closes his eyes and says "Mississippi!" triumphantly.)
AJ: (completely agitated, can barely hold it together) "David, you are NOT reading!  You just closed your eyes and said Mississippi!"
David: "No, I am reading.  Here, I will do it again...(closes eyes) MISSISSIPPI!"
AJ: (starts around the table to attack David) "You are a moron!"

At this point, Joe intervened to prevent any physical altercation, but I am pretty sure he was trying to suppress a laugh at the same time.  This reminds him of the breakfast table at his house growing up, and I think he misses that a little.