2. Practice determines cognition, which is the foundation and source of cognition; Practice is the driving force of cognitive development; Practice is the only criterion to test the truth; Practice is the purpose and destination of cognition.

Methodology requires us to know and discover truth in practice, and to test and develop truth in practice. Understanding has a negative effect on practice, and scientific theory has a great guiding role in practice.

3. Truth is objective, concrete and conditional. Truth is truth for a specific process, condition and scope, otherwise it will become fallacy.

4. People's knowledge is repetitive, infinite and rising. We should know and discover truth in practice, and test and develop truth in practice.

Extended data:

Cognition comes from the need of practice, and the development of practice provides people with increasingly complete cognitive tools, which extend human cognitive organs and promote the development of human cognition. In addition, practice exercises and improves people's cognitive ability.

To test whether an understanding correctly reflects objective things needs to be tested by combining subjective and objective practice. Through practice, people compare the knowledge that guides their own practice with the results produced by practice to test whether knowledge correctly reflects objective things.

Knowledge comes from practice and finally returns to practice (guiding practice). Understanding is not an end in itself, but transforming the world is the purpose and destination of understanding.

Method:

1. Practice is the foundation, source, motivation, sole standard, purpose and destination of cognition, which requires us to adhere to the view of practice first and actively participate in practice.

2. Cognition has a reaction to practice, which requires paying attention to the reaction of cognition and giving play to the guiding role of scientific theory in practice.

3. Truth is objective, concrete and conditional. We need to treat mistakes correctly and constantly enrich, develop and improve the truth in practice.

4. Knowledge is repetitive, infinite and rising, and the pursuit of truth is a process, which requires keeping pace with the times, pioneering and innovating, knowing and discovering truth in practice, and testing and developing truth in practice.

References:

Baidu encyclopedia-dialectical materialism epistemology