2.？ Deduction: Deduct concrete conclusions from general premises, that is, deduce special conclusions from general principles.
3.？ Comparison method: draw a conclusion by comparing two or more things.
4.？ Empirical method: through experiment, investigation and observation. , get the data and draw a conclusion.
5.？ Statistical method: Through statistical analysis of data, draw a conclusion.
6.？ Formal logic method: through formal logic method, infer the true value of the proposition and draw a conclusion.
7.？ Simulation method: draw conclusions by simulating some situations.
8.？ Authoritative law: draw conclusions by citing the opinions of experts, scholars and authoritative organizations.