Move EVIDENCE_DIRECTION_GROUPS out of the mock fixture library into lib/graph/evidence-direction.js where it belongs. Remove unused DECISION_CONDITIONS and CONTRADICTION_KEYWORDS exports from scenarios. Add Experiment 24A entry to the design log.
Move EVIDENCE_DIRECTION_GROUPS out of the mock fixture library into lib/graph/evidence-direction.js where it belongs. Remove unused DECISION_CONDITIONS and CONTRADICTION_KEYWORDS exports from scenarios. Add Experiment 24A entry to the design log.