@Wisdom Pen
Derpy’s not a dunce, either.

The Major General was not a dunce the point of the song was that he was highly intelligent in all matters except those that would actually be useful in a military position which was a very common problem with officers at the time who had bought their commission.

I am the very model of a modern Major General  
I’ve information vegetable, animal, and mineral  
I know the Kings of England and I quote the fights historical,  
From Marathon to Waterloo, in order categorical
 
I’m very well acquainted too with matter mathematical  
I understand equations, both the simple and quadratical  
About binomial theorem, I am teeming with a lot of news  
With many cheerful facts about the square of the hypotenuse
 
I’m very good at integral and differential calculus  
I know the scientific names of beings animalculous  
In short, in matters vegetable, animal, and mineral,  
I am the very model of a modern Major General.

My military knowledge, though I’m plucky and adventurey  
Has only been brought up to the beginning of the century  
Still in matters animal, vegetable and mineral  
I am the very model of a modern major general.

I eradicate your preconceptions, proving them ephemeral.