SCIENCE AND TECHNOLOGY ENGLIAH FOR MECHANICAL ENGINEERING When defining a word we cannot define it by repeating the word itself in the definition. If we define the word"manipulator by saying that it means a mechanical component that manipulates, we have committed this error. The real question What is a manipulator? is left unanswered. The pretended definition does not enlarge anybody's knowledge, it merely repeats the term to be defined: manipulators manipulate It is also possible to make the error of circular definition without repeating a word, but merely by repeating an idea, as.The causes of war are the several factors that result in armed conflictSCIENCE AND TECHNOLOGY ENGLISH FOR MECHANICAL ENGINEERING When defining a word we cannot define it by repeating the word itself in the definition. If we define the word "manipulator" by saying that it means a mechanical component that manipulates, we have committed this error. The real question: “What is a manipulator?” is left unanswered. The pretended definition does not enlarge anybody's knowledge, it merely repeats the term to be defined: manipulators manipulate. It is also possible to make the error of circular definition without repeating a word, but merely by repeating an idea, as, “The causes of war are the several factors that result in armed conflict