The actual law was guidance to his engineers, to design components that could not be mistakenly used in service: "If a part can be installed in more than one position, it will be incorrectly installed in the field."Johnson, Doug. A Question from Vietnam on Murphy's Law. Voice of America. 30 November 2006 [2023-05-31]. (原始内容存档于2006-12-05).
The actual law was guidance to his engineers, to design components that could not be mistakenly used in service: "If a part can be installed in more than one position, it will be incorrectly installed in the field."Johnson, Doug. A Question from Vietnam on Murphy's Law. Voice of America. 30 November 2006 [2023-05-31]. (原始内容存档于2006-12-05).