{"id":"ACC-003","name":"No nested double negatives","domain":"accessibility","layer":"sentence","strength":"hard_constraint","human_logic":"IF a double negative or negative inside another condition obscures polarity, THEN rewrite with one explicit positive or negative operation ELSE retain a necessary legal distinction with explanation.","when":{"path":"sentence.polarity_nesting_depth","operator":"gt","value":1},"then":[{"action":"rewrite","target":"single_explicit_polarity"},{"action":"explain","target":"sentence","when":"legal_distinction_required"}],"else":[{"action":"retain","target":"current_text","reason":"No triggering condition is present."}],"unless":[],"because":"Polarity nesting raises the chance of reversing the intended action.","diagnostics":[],"examples":{},"source_ids":["WEB-006"],"laka":{"smallest_sufficient_intervention":true,"primary_axes":["scope","depth","magnitude","reversibility"]},"requires_facts":["sentence.polarity_nesting_depth"],"tests":[],"sources":[{"id":"WEB-006","title":"Making Content Usable for People with Cognitive and Learning Disabilities","creator":"W3C","domain":"cognitive_accessibility","type":"W3C Working Group Note","note":"Clear words, simple voice and tense, explicit instructions, and supportive structure.","url":"https://www.w3.org/TR/coga-usable/"}],"defined_in":{"file":"17-accessibility-rules.json","title":"Accessible and Cognitively Usable Writing Rules","slug":"accessibility-rules"}}