Sentence examples for single one from inspiring English sources

"single one" is a grammatically correct phrase and can be used in written English
It is commonly used as a way to emphasize that there is only one of something. For example: - "Out of all the applicants, only a single one met the qualifications for the job." - "I can't believe that she ate the entire cake in a single one sitting." - "The tree stood tall and strong, its single one branch reaching towards the sky."