Short Answer
Chang argues that scientific revolutions do not solely replace old theories but allow for multiple theories to coexist, enriching scientific discourse. He highlights the value of diverse perspectives in advancing knowledge and emphasizes the complexity of scientific progress as a process shaped by interactions among various theories.
Step 1: Challenge Conventional Views
Chang questions the typical notion that scientific revolutions result in a complete replacement of old theories by new ones. Instead, he posits that it is possible for multiple scientific theories to exist simultaneously, providing different interpretations of the same phenomena. This perspective invites a richer discussion on how science evolves over time.
Step 2: Emphasize the Value of Diversity
He underscores the importance of diversity within scientific theories, arguing that rather than discarding alternative perspectives, they should be regarded as valuable contributions to our understanding. This approach can lead to a more nuanced view of scientific knowledge, which is beneficial for the advancement of the field.
Step 3: Acknowledgment of Complexity in Progress
In his view, scientific progress is not just about radical changes but is often characterized by a complex interaction between various theories. By accepting that old and new theories can coexist, Chang fosters a more comprehensive understanding of how scientific knowledge develops over time, enhancing the overall dialogue in the community.