The document discusses how qualitative (qual) methods can help strengthen quantitative (quant) analysis. It provides examples of how qual concepts are used in physics to conceptualize problems. It then discusses how qual and quant approaches are both used to understand systems by extracting data, creating models, and generating insights and predictions. Finally, it outlines three common areas where qual can help quant: improving classification of objects, ensuring relevant data is used, and properly defining the scope of analysis. The overall message is that qual and quant should be viewed as complementary approaches, with qual helping to maximize the value obtained from quant methods.