{"id":"GRM-007","name":"Tense consistency within a time frame","domain":"grammar","layer":"paragraph","strength":"context_default","human_logic":"IF tense changes but event time and narrative viewpoint do not, THEN restore the established tense ELSE keep the meaningful time shift.","when":{"all":[{"path":"paragraph.tense_shift","operator":"eq","value":true},{"path":"paragraph.event_time_shift","operator":"eq","value":false},{"path":"paragraph.viewpoint_time_shift","operator":"eq","value":false}]},"then":[{"action":"align","target":"paragraph.tense","value_from":"paragraph.established_tense"}],"else":[{"action":"retain","target":"current_text","reason":"No triggering condition is present."}],"unless":[],"because":"Tense shifts should encode time or viewpoint, not accident.","diagnostics":[],"examples":{},"source_ids":["BK-004","BK-007","BK-010"],"laka":{"smallest_sufficient_intervention":true,"primary_axes":["scope","depth","magnitude","reversibility"]},"requires_facts":["paragraph.tense_shift","paragraph.event_time_shift","paragraph.viewpoint_time_shift"],"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-007","title":"The Copyeditor's Handbook","creator":"Amy Einsohn; Marilyn Schwartz","domain":"copyediting","type":"Book","note":"Professional copyediting practice, grammar, and editorial process.","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}],"defined_in":{"file":"07-core-grammar-rules.json","title":"Core Grammar Rules","slug":"core-grammar-rules"}}