I think the answer is President Monroe
"poll tax" describes a legal means southern whites used to prevent blacks from voting in the post-Reconstruction era but there were other means as well.
was murdered during the early morning on 30 December [O.S. 17 December] 1916 at the home of Felix Yusupov. He died of three gunshot wounds, one of which was a close-range shot to his forehead.
I believe postulates are given or assumed true statements without a proof. And a theorem can be proven. You do this in geometry if I remember correctly.
