{"id":"btree-internal-split-promotes-key","text":"Internal node splits promote the midpoint key into the parent (removing it from the child), unlike leaf splits which copy it (the key remains in the right child); this asymmetry allows uniform `bisect_right` routing at all internal levels.","truth_value":"IN","source":"entries/2026/05/29/topic-bisect-right-vs-left-in-btrees.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"btree-internal-split-promotes-key","truth_value":"IN","reason":"premise"}]}}