What do you think Vonnegut means when he says that he is a ""real person""? Why does he work so hard to convey this point?

Vonnegut means when he says that he is a ""real person" is that some people damage his reputation by saying that his writing are fictitious  and damage for the mind of student.

Explanation:

Charles McCarthy, the head of the school board has decided to burn all books of Vonnegut because he assumes that the lesson taught to the children has inappropriate language. For this reason, Vonnegut wrote a letter to the Charles McCarthy, who was the head of the school board in order to explain that the lessons wrote by him has no appropriate language or any evil ideas which damage the character and mind of the student.

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.

b - those executed came from every social and economic class