It is, that's a valid argument.
这是个有效论点。
So that's a valid argument. Accept it?
这是个有效论点，对吗？
That is not a valid argument or excuse.
那是一个不能令人信服的理由或托词。
You, you give me the definition of a valid argument.
你们给我一个有效论点的定义。
Okay does everyone see why this is a valid argument?
大家都明白为什么这是有效论点了吧？
How can we get a valid argument form from talk of morality?
我们怎样从道德的谈论中得到一个有效的论点形式呢？
Q Here is a valid argument form. If P then Q. P therefore Q.
这里有一个有效的论点形式，如果P，那么Q，P所以。
So what do we know? This is a valid argument isn't it? Yes?
我们知道什么呢？这是个有效论点，不是吗？
You could have a valid argument in which the premises are false.
前提为假,论点可能为真。
What you gave me wasn't a valid argument do you have another one?
你给我的不是一个有效的论点，你们还有吗？
It's only sound if it's a valid argument and it has true premises.
如果是有效论点才会完好，他有真前提。
So you could have a valid argument in which the premises are all false.
一个有效论点可能,前提都为假。
So if we see the conclusion of a valid argument is false what do you know? A little bit longer.
如果我们看到有效论点的结论为假，你们知道什么？有一点长。
Actually a valid argument doesn't have true premises and true conclusion what is a valid argument?
实际上一个有效论点没有真前提和真结论，什么是有效论点呢？
So it's a valid argument but has false premises. Okay what about if it is an invalid argument with false premises.
这是个有效的论点但是有假前提，如果是无效论点有假前提呢？
That's right. So if you have a valid argument a deductively valid argument in which the conclusion is false then you know one of the premises must be false.
对，所以如果论点有效，一个演绎的有效论点中结论是假的，你就知道前提中有一项是假的。
When executing the script containing getopt, named opttest, using a valid argument of -x-or --xxxxx, getopt recognizes the switch and executes the code within the case switch
在执行包含getopt（称为opttest）的脚本时，如果在 -x 或 --xxxxx 中使用有效的参数，getopt 会识别出开关并执行 case 开关中的代码
Supporters of each candidate have a valid argument to make, but shouldn't they have the benefit of being able to consider postseason performance in making their determination?
每位候选人的支持者们为了各自的偶像相互之间争论不休，既然这样他们为什么不将季后赛各人的表现考虑在内呢？
So if you negate that conclusion and took away the therefore, if you negated that conclusion the set would be inconsistent wouldn't it? And that shows you that that's a valid argument.
如果你否认结论，把所以拿掉，那么，如果你否认结论，这就不一致了，不是吗？这显示这是一个有效论点。
A good deductive argument is sound if and only if it's both valid and has true premises.
一个好的演绎论点是完好的，如果且仅如果这些都有效，并且前提为真。
And that's what tells you whether the argument is valid or not So this is a deductively valid argument and this is a fallacy.
这是他告诉你结论是否有效，这是演绎有效的论点，这是一个谬论。
So circular argument is always valid and what tells you is that there got to be more to a good argument than validity.
所以循环论点都有效，告诉你们，好论点，比为真有更多要有的。
Could this argument be valid say yes - as a matter of fact this argument must be valid.
这个论点有效，说对-，实际上这个论点肯定有效。
But I don't want it to be persuasive because of a fallacy I actually want it to be a good argument as well, so I want it to be sound and valid.
但是我不想让他因为一些谬论更加有说服力，我实际上想让它成为更好的论点，所以我想让他完好有效。
Is the argument in favor of promoting diversity a valid one?
这样的争论是不是倾向于把推行多样化变成合理的呢？
This is a deductively valid argument and its truth preserving and therefore it is very, very useful.
这是个演绎的有效论点，保留了真理，所以非常有用。
Now that looks like a deductively valid argument doesn't it?
这看起来像演绎有效的论点，不是吗？
So it's a sufficient condition for an argument being valid that there is no possible situation where the premises are true and the conclusion false. And that's a necessary condition too.
所以这对于论点有效性是充分条件，没有可能前提为真，结论为假，这是必要条件。
Here's a second example of begging the question, in which a dubious premise which is needed to make the argument valid is completely ignored: "Murder is morally wrong."
第二个例子，在这里令人怀疑的、结论所需要的前提，被忽略了。
Because most tools take standard input as an argument using a hyphen (-), even the argument for using cat to intersperse multiple files with stdin is often not valid.
由于大多数工具都接受使用连字符(-)的标准输入作为一个参数，因此即使使用cat来分散stdin中的多个文件，参数也通常是无效的。
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