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by the book
01
strictly adhering to established rules, procedures, or standardized practices
What is the origin of the idiom "by the book" and when to use it?
The origin of the idiom "by the book" draws from the idea of following instructions or guidelines found in a book or manual, which can be traced back to ancient times. This phrase may have gained prominence during the 19th century, as the use of written rules and regulations became more widespread in various fields. It is commonly used in discussions related to law, regulations, policies, and professional practices.
Example
The detective solved the case by the book, meticulously gathering evidence and following every procedure.
The jury deliberated carefully, ensuring that their verdict was reached by the book, considering the evidence and applicable laws.
The new employee knew that her boss was watching her every move, so she made sure to walk the chalk and do everything by the book.
The teacher graded the exams by the book, using the established criteria and marking scheme.
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