SDCAR2010【逻辑入门】（十三）Formal Logic (1)

bonfin

必要条件标志：then/only/only if/must/required/unless/except/until/without

reyanwoo

got it
thank you

812966141

关于only if。你是解释的最清楚的！onlyif = then clause```!!!!!!!!!

晓野的野

前面一部分讲的是充分条件 很好理解
only if 讲的是必要条件 这个稍难理解一点了

ken121222

I learned a lot. thank you!

wjtwenzi

Find a little tiny mistake in your passage:
"Translation: If you enter this restaurant, then you were a shirt."
Obviously "wear" is the right word ;)

wjtwenzi

VincentShu 发表于 2011-7-23 15:37
SDCAR2010【逻辑入门】（十三）Formal Logic (1)?    Maybe this is twelve

http://forum.chasedream.com/thread-573332-1-1.html
Here is 12 ;)

virgmat

sdcar2010 发表于 2011-9-18 20:59
D就是: If pharmaceutical companies can afford the research that goes into the development of new dru ...

觉得这句话的没转换准确，应该是〜

(D) Pharmaceutical companies canafford the research that goes into the development of new drugs only if patentsallow them to earn high profits.
= if pharmaceutical companies can afford the research that goes into the development of new drugs, then patents HAVE allowed them to earn high profit.

请指教〜

醒醒Shine

以前对only if一直有误解！谢谢楼主！终于明白only if引导的是必要条件啊，if引导的才是充分条件！

zhangyanlele

解释的好清楚，终于搞懂了他们的区别！