Critical is exact, not decorative — from the Greek krinein, to sift and separate. Crift sifts a problem into its real parts and separates what matters from what doesn't.
Not a better tool in an old category. A new one — critical reasoning.
MECE assumes one implicit connective — the parallel AND of a dimensional partition. Crift carries the connective as data and applies the right completeness-and-distinctness law per type. Classic MECE is what you get when every node is an AND node.
MECE is a property a human eyeballs a hand-built tree against, after the fact. Crift produces the structure and measures completeness as a stored, type-local signal that feeds repair.
Real causal reasoning requires reconvergence — two paths sharing an enabling fact. Crift enforces exclusivity inside a partition and lets the graph reconverge across them. MECE scores that a violation; Crift calls it fidelity.
Not “there are no gaps” but “every gap is named” — a first-class object you can act on. Falsifiable, and far more credible than a bald “exhaustive.”
MECE was a presentation technology born of human working-memory limits. Crift doesn't share those limits — it holds the reconvergent graph and projects a clean view only when a human needs to read it.