结论无据和因果联系具体怎么分啊？

七宗罪里有结论无据和因果联系，但是总感觉结论无据其实就是说题目中的结果没有合理原因啊。所以一直糊涂。能不能有哪位帮我解释下啊？

比如

The following appeared in the editorial section of a local newspaper.

“In the first four years that Montoya has served as mayor of the city of San Perdito, the population has decreased and the unemployment rate has increased. Two businesses have closed for each new business that has opened. Under Varro, who served as mayor for four years before Montoya, the unemployment rate decreased and the population increased. Clearly, the residents of San Perdito would be best served if they voted Montoya out of office and reelected Varro.”

我找了时地全等，因果联系（administration与economy不一定有因果联系）

那么这题还有什么错误呢，结论无据是否可以应用？

多谢指点～

任何一个错误都可以说成是没有合理原因。所以你要根据七宗罪然后形成自己对逻辑错误地分析，考试的时候才好上手。

其他的原因比如忽略他因，第一个市长执政的时候也许有自然灾害

或者第二个市长的功绩是建立在第一位市长的基础之上的