标题: 再次求解~ [打印本页] 作者: luckysea 时间: 2012-3-7 09:08 标题: 再次求解~ No one can be licensed as an electrician in Parker County without first completing a certain course in electrical safety procedures. All students majoring in computer technology at Parker County Technical College must complete that course before graduating. Therefore, any of the college’s graduates in computer technology can be licensed as an electrician in Parker County. The answer to which of the following would be most helpful in evaluating the argument?
A: is a college degree a requirement for being licensed as an electrician in Parker County ? B: do all students majoring in computer technology who complete the course in electrical safety procedures at Parker County Technical College eventually graduate? C: is completion of a course in electrical safety procedures the only way a person licensed as an electrician in Parker County can have learned those procedures? D: is a period of practical apprenticeship a requirement for becoming a licensed electrician in Parker County but not for graduating from the college in computer technology? E: do any of the students at Parker County Technical College who are not majoring in computer technology take the course in electrical safety procedures? 想不通，请教高手~作者: 子弹青春 时间: 2012-3-7 09:44
The constructions above the arugments is that: premises: The complement of the course is the necessary condition for the license( not sufficient condition!!!); All the students gratuating from the college must have had such course. In another word, gratuates means complement of the course. Conclusion: students gratuating from the college must get the license, which means complement of the course is the sufficient condition for the license.
The only way to make this right is to make complement of the course become the necessary-sufficient condition for the license.