{"id":"GRM-019","name":"Logical negation","domain":"grammar","layer":"clause","strength":"hard_constraint","human_logic":"IF two negatives unintentionally cancel into a positive, THEN replace them with the intended positive or single negative ELSE retain deliberate litotes or dialect.","when":{"all":[{"path":"clause.negative_count","operator":"gte","value":2},{"path":"clause.intended_litotes","operator":"eq","value":false},{"path":"context.mode","operator":"neq","value":"quoted_dialect"}]},"then":[{"action":"replace","target":"clause.negation","value_from":"intended_polarity","prefer":"single_operator"}],"else":[{"action":"retain","target":"current_text","reason":"No triggering condition is present."}],"unless":[],"because":"Nested polarity increases error risk and can reverse the intended meaning.","diagnostics":[],"examples":{},"source_ids":["BK-004","BK-010","WEB-006"],"laka":{"smallest_sufficient_intervention":true,"primary_axes":["scope","depth","magnitude","reversibility"]},"requires_facts":["clause.negative_count","clause.intended_litotes","context.mode"],"tests":[],"sources":[{"id":"BK-004","title":"English Grammar in Use","creator":"Raymond Murphy","domain":"learner_grammar","type":"Book","note":"Self-study explanations and practice for core English grammar.","url":null},{"id":"BK-010","title":"Practical English Usage","creator":"Michael Swan","domain":"usage_reference","type":"Book","note":"Advanced grammar and usage reference for learners and teachers.","url":null},{"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":"07-core-grammar-rules.json","title":"Core Grammar Rules","slug":"core-grammar-rules"}}