Not every clash-detection hit means two objects actually occupy the same space — and treating them as if they do misses two entirely different kinds of real problems.
Ask most coordination teams what a "clash" is and they'll describe two solids literally occupying the same 3D space — a duct punched straight through a beam. That is a real category, and it is the one automated clash-detection software is built to find first. But BIM coordination practice recognizes two other kinds of conflict that never show up as a geometric intersection at all: one is about violated clearance, the other is about violated time. All three get called "clashes." Only one of them is caught by checking geometry alone.