Positive examples of doubt and knowledge
1. Copernicus doubted the geocentric theory of Eudoxus, Aristotle, and Ptolemy, so he proposed the heliocentric theory and published " Movement of Celestial Bodies".
2. Galileo doubted Aristotle's mechanical theory and conducted an experiment on the Leaning Tower of Pisa to prove that "the speed of an object falling has nothing to do with the weight of the object."
3. He dares to doubt the outdated theories of his predecessors, dares to overthrow the erroneous theories of his predecessors, and can critically accept the scientific legacy of his predecessors. When he was young, he carefully studied the academic achievements of Zhang Heng, Zheng Xuan and others, corrected some of their errors, and achieved many valuable research results. Later, he discovered that there were many errors in the "calendar" compiled by the famous astronomer He Chengtian for the Song Dynasty at that time, so he began to recompile a new calendar - the "Da Ming Calendar".
4. The famous Leaning Tower of Pisa experiment. In order to adhere to the truth, Galileo challenged Aristotle, the authority at the time, and used facts to prove his point of view: two objects of different weights were dropped from the same height at the same time. Landing.
5. Americans Adam and Jimmy once questioned Archimedes' use of mirror reflection to burn down Roman warships. They also conducted experiments and found that the Roman warships were not burned down, but were discovered by the Roman commander. The temperature of the warship had risen very high. They were afraid that the warship would burn, so they retreated.