After graduating from university, A, B and C choose to pursue different professions: teacher, lawyer and engineer  Other students made the following guess: Xiao Li: A is an engineer, B is a teacher  Xiao Wang: A is a teacher and C is an engineer  Xiao Fang: A is a lawyer and B is an engineer
It was later proved that Xiao Li, Xiao Wang and Xiao Fang were only half right
A is a lawyer, B is a teacher and C is an engineer