One: real learning is not subject-specific, and there will be similarities when it reaches a certain height. Many scientists have deep attainments or strong interests in art.

Two: China's education emphasizes the examination, and once the examination, the purpose of learning will be impure, and people's thinking can't be really exercised.

Three: I personally think that philosophy is to generalize and summarize the universality of things. Learn more philosophy and see things more macroscopically and thoroughly. Logical thinking ability is one of its thinking characteristics.

Four: Personally think that the purpose of mathematics is to solve the problems that need to be solved in life by mathematical methods, and its process is to find problems, ask questions and solve problems, which requires various abilities. Similarly, it certainly includes the ability of logical thinking.