Logic:
It is a branch of philosophy. It is the study of the law of thinking. The development of logic and logic has gone through three stages: concrete logic abstract logic concrete logic and abstract logic.
Logic is a discipline that studies thinking. All thinking has two aspects: content and form. The content of thinking refers to the objects and their attributes reflected by thinking; Thinking forms refer to different ways of reflecting objects and their attributes, that is, different ways of expressing thinking content. From the perspective of logic, the three basic forms of abstract thinking are concept, proposition and reasoning.
The application in life includes:
1. Cognitive tools: help people understand things correctly, explore new results, and acquire new knowledge;
2. Expression tools: help people express ideas accurately, rigorously and clearly and establish new theories;
3. Persuasion tools: help people to make more rigorous and persuasive reasoning and argument;
4. Analytical tools: help people expose fallacies and refute sophistry. It helps to think correctly, distinguish right from wrong, and clean up the source.