Fadhila Dhuha Oktiana, Budi Santoso, and Rahmi Sulistyarini. “he eaning and imitations of the hrases “Valid” and ‘Appropriate’ in lectronic ummons from the erspec-ive of the rinciple of egal ertainty”. Journal of Science and Education (JSE) 6, no. 2 (January 19, 2026): 1374-1380. ccessed October 7, 2026. https://jse.rezkimedia.org/index.php/jse/article/view/734.