Stem: "Two years ago, City L was listed 14th in an annual survey that ranks cities according to the quality of life that can be enjoyed by those living in them. This information will enable people who are moving to the state in which City L is located to confidently identify one place, at least, where schools are good, housing is affordable, people are friendly, the environment is safe, and the arts flourish."
The argument that City L can be identified as place, where schools are good and housing is affordable, because City L was listed 14th in the survey omits some very important considerations that need to be addressed to get a full 360-degree view of the described scenario. The Conclusion of the argument relies on assumption that all the factors listed in the argument were used to calculate quality of life, for which there is no clear evidence. While the author's argument has some merit, it suffers from number of flaws, ranging from flimsy use of evidence to ill-conceived elements of assumption.
Firstly, the argument assumes that all the factors such as good schools, affordable housing, friendly people, safe environment, and flourishing art were used to calculate the quality of life. The factors used to calculate quality of life in city L could have been entirely different or not exactly same as the author listed. Another example is that factors listed in the argument hold the least weight to determine quality of life in city L. The argument could have been better if the author would have explicitly stated the factors based on which quality of life was calculated in city L.
Secondly, the argument assumes that if the quality of life was enjoyed by those living in city L then city L will surely have good schools, affordable housing. From this statement again, it is not at all clear that how can author determine the factors upon which quality of life was enjoyed without giving evidence. To illustrate, the population of city L could be composed of just elderly people who do not need good schools. While the quality of life was enjoyed by elderly people, it does not necessarily mean that housing was affordable. The population of city L could constitute entirely of rich families who can afford pricey housing and still enjoy quality of life. If the argument had mentioned that the quality of life was enjoyed by population in city L because of its good schools and affordable housing then the argument would have been much cleaner.
Lastly, the argument assumes that results of survey still hold good after 2 years. It could also be true that in last two years city L has slipped the rank and is no more a place with enjoyable quality of life. Without the above mentioned evidence, one is left with impression that the argument is not substantiated in any way. As a result, the author needs to state that survey results still hold good in order for the conclusion to stay air-tight.
In summary, the argument is extremely flawed because of the above mentioned reasons and hence come across as weak and unconvincing to the reader. Without the above mentioned facts, the argument is unsubstantiated and open to debate.