I need to go out on a limb. The phrase “qualitative vs. quantitative” is all wrong. Just plain wrong. Stated as such, we’re misled into believing that qualitative and quantitative information are completely different categories of thing. First: they’re not. Second:

Premises

Set Theory

Zoom out with me for 30 seconds. Remember Set Theory? Don’t worry, nobody does. But it takes 30 seconds to re-learn. It’s Venn diagrams.