That's examples of deductively valid arguments.
这是演绎有效论点的例子。
Its truth has been proven inductively, not deductively.
它的真实性是被证明归纳而成的，而不是靠推理演绎得来。
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？
It's deductively valid. Anyone else wants to try another one?
这是演绎有效的，谁还想试试？
Now I had said some arguments are deductively valid but not in virtue of their form.
我说过一些论点是演绎有效的，但是不是它们的形式。
Good, we then looked at some examples of arguments that are deductively valid in virtue of their form.
好，我们看着一些论点，通过它们的形式演绎有效。
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。
In Gardner's words, it entails the ability to detect patterns, reason deductively and think logically.
用加德纳的话说，它导致了检测模式、理性推理和逻辑思维能力。
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。
Now here its very important to distinguish from contents okay, arguments are deductively valid in virtue of their forms rather than their contents.
区分形式和内容非常重要，论点在形式上是演绎有效的,而不是在内容上。
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。
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。
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