This one is more method than concept, but it's pretty central to science: It's okay to change your mind. Knowledge is based on facts devoid of moral value, and

This one is more method than concept, but it's pretty central to science: It's okay to change your mind. Knowledge is based on facts devoid of moral value, and some of these facts will be replaced as we learn more about reality. A body of knowledge that can rebuild itself in the face of new evidence, and goes so far as to seek out new evidence, is one that gets stronger and healthier.