是真的，是真的！
A true friend or a true friend?
一个真正的朋友或一个真正的朋友？
That's true, and I know that's true.
这是真的，我知道这是真的。
They used to be true, but it isn't true anymore.
它们曾经是真的，但现在不再是真的了。
This is always true, but this is only true when it is pure roll.
这永远都是成立的，但只有纯滚动的条件下才会成立。
Tell me if this be all true, my lover, tell me if this be true.
告诉我，这一切是否都是真的。我的情人，告诉我，这是否真的。
So if the premises are true then the conclusion must be true.
所以如果前提是真的，那么结论必须是真的。
We are saying if this is true then this is true.
我们说如果这是真的，那么这也是真的。
If the opposite is true, it is not true love.
如果实际情况是相反的，那就不是真爱。
True history being a mixture of all things, the true historian mingles in everything.
历史既然包罗一切，真正的历史学家便应过问一切。
Which facts about evolution had to be true, and which just happen to be true?
关于进化的事实哪一些肯定是真实的，而哪一些碰巧是真实的呢？
Now that's not true of all deductions but are true of most deductions.
不是说所有的演绎都是真的，但是大部分都是。
Everyone has their own truth though and what is true for me may not be true for you.
然而每个人都有自己的实际情况，对我来说正确的东西可能对你们来说就不正确了。
This sentence is saying either this is true or this is true.
这个句子说要么这个为真，要么这个为真。
In fact, people will often either tell you what they think you want to know, or they will tell you what they believe to be true, whether it's true or not.
事实上，人们时常会告诉您您想知道的他们在想什么或者他们相信什么是真的，无论那是真还是假。
Even if it is true, how do you know it will be true tomorrow?
即使是真的，你怎么知道它明天还会是真的？
Because we know that if the premises are true the conclusion must be true.
因为我们知道如果前提为真，结论肯定为真。
If Technical Statement B is true, then Natural Conclusion C is true.
如果技术声明B是真命题,那么自然结论C也是真命题.
If this premise is true then this conclusion is probably true.
如果前提为真，这个结论可能为真。
Notice that the premises are true, the conclusion is true but not the argument itself.
注意前提是真的，结论是真的,但是结论不是。
If that's true and that's true then that must be true.
如果那是真的，那肯定就是真的。
That's true for companies, and it's true for products.
这对公司来说是正确的，对产品也是如此。
"And what's true for words is also true for people," I continued.
于是继续道：“真理是人行为的指示标。”
What about if its got true premises and a true conclusion?
如果有真前提和真结论呢？
If the premises were true would the conclusion be true also.
如果前提为真结论也为真。
How can P and Q be true if Q isn't true.
如果Q不为真，P和Q怎么可能为真。
Here the two premises are true and the conclusion is true.
两个前提为真，结论为真。
Okay so that's true and that's true is that true? Is this valid?
所以那是真的？这有效吗？
OBAMA: That's not true, John. That's not true.
奥巴马：（插话）那不是真的，约翰。那不是真的。
杰夫：真的，是真的！
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