Four contestants, Zhang, Liu, Li and Zhao, who were not familiar with each other, participated in the university speech contest  They come from mathematics, logic, literature and history majors  Before the game, the four people made the following guesses: Zhang: Zhao's major is logic; Liu: Li's major is literature; Li: Zhang's major is not mathematics; Zhao: Liu's major is history
It was learned afterwards that only the guesses of mathematics and logic professionals were correct
Literature, history, logic, mathematics