Some people say that everyone who is admitted to the university is a student who studies well. Zhang San did not enter the university, so Zhang San is not a student who studies well. Which of the following inferences clearly shows that the above argument is not valid? ["All those who have achieved success have to dress and eat. I have no achievements now, so I don't have to dress and eat.", 'Commodities have use-value, and land has use-value, so land is a commodity.', 'All the civil servants who have been rated as excellent have villager work experience, and Xiao Zhang has been rated as an excellent civil servant, so Xiao Zhang has work experience in the village.', 'Theft is illegal, and illegal acts will be severely punished by the law, so theft should be severely punished by the law.']