Complex questions tempt infinite slicing. Start by defining the core contrast that actually answers the decision question. If extra categories blur the picture, collapse them thoughtfully (with a note explaining how). You’ll reveal the signal that stakeholders can act on. Then, and only then, add nuance back selectively: re-expand categories where stakes are high, where ethics demand subgroup visibility, or where policy differs by segment. This two-step rhythm (clarity first, complexity earned) keeps you from drowning in degrees of freedom or chasing spurious subgroup swings. It also disciplines your storytelling: lead with the clear answer, follow with the “and here’s how it varies.” Collapsing isn’t dumbing down; it’s building a clean lens before zooming. If the core effect disappears when you re-expand, that’s not a failure… it’s a finding.
