P2.7 The categorical statement

直言命题-言之有据。比如：“收音机在车的后座”，这就是一个准确的描述。“收音机可能在车的后座”，就不是一个准确的描述。

the purpose of the reasoning precess, logic's principal concern, is demonstration（论证）--逻辑推理首要关心的是论证。(言之有据）。i am not reasoning with you if i simply say that suah-and-such is true and expect you to accept it as true only on my say-so. i must show you chant such-and-such is true, and i do tat by make an argument. an argument will only be as good as the statements of which it is composed, and those statements, in turn, will only be as good as the terms of which they are composed. everything i have said thus far has been said with argument in mind. argument（论证）is the activity  of logic, and any particular argument is a concrete manifestation fo the reasoning process. the next step in the process will be to look more closely at the statement, ,more specifically, at the "categorical statement."  the most effecctive argument is one whose conclusion is a categorical statement. a categorical statement tells us that sth definitely is the case. 

今天的这一章读的不是很懂，所以把主要内容手打了一遍，但是还是不理解。对于statement，我查词典，理解成了描述，总觉得说不通。看了中文版，里面的翻译是命题，这个翻译很通透。但是任然觉得这章的内容和逻辑思考搭不上关系，看来还要再看几遍了。