In English, rule of thumb refers to an approximate method for doing something, The exact origin of the phrase is uncertain.
What's the meaning and origin of the phrase 'Rule of thumb'?.
Sharon Fenick first heard the figure of speech "rule of thumb" cited as a Many feminists for years thought the phrase "rule of thumb" referred to British herself, was determined to unravel the history of the "rule of thumb.
However, some people currently believe that the phrase "rule of thumb" originated from English common law, and that the phrase reflects a law.
We read an email about the supposed etymology of the phrase "rule of thumb," linking it to an old law about wife beating. As the myth goes.