lsat-3-1-22

答案d 不过是对提干最后一句话的简单重复，因此不是推论。

推论是从已知得未知。generally speaking, inference is an opinion or guess you draw from what you have known.

For example, my rolling pins differ from yours in terms of their colours. But either mine or yours are rolling pins. you can't deny this only because yours are red and mine are blue. Herein colour is not conclusive. In fact, an inference is usually based on some common sense of society. For example, on Earth rolling pins are characterised by their same function. Maybe on another planet, eg. Apex, rolling pins are defined by their colours. For example, in Apex, if and only if a utensil is blue, it can be called 'rolling pin'.

另外一个例子，200多年以前，C 国的人认为，如何检验一个东西是对还是错，判断标准是哲学家K的话。80多年以前，C 国的人认为K的话不对，我们要打倒K家店。于是，有过了30多年，M家店得以确立。但是20多年以前，M家店也被打倒了。 Practice 的权威得到确立。 现在不管P家店是不是omnipotent and omniscient, 但是比起K家店和M家店它是一个历史进步。至少C国的一部分人不再被一两个old men所愚弄。

第二个例子车的有点远，不平则鸣，各位看官自有公道。

谢谢dphxmg，经典的