If you remember we looked at deductive arguments sound.
如果你记得我们看演绎论点的完好。
There are deductive arguments and there are inductive arguments.
演绎论点和，归纳论点。
Decide which of those are deductive arguments and which of those are inductive arguments.
决定哪些是演绎论点，哪些是归纳论点。
This time deductive arguments and in particular we've got to look at the notion of validity.
这次是演绎论点，特别是我们要看看有效性的概念。
Okay, that's where I was going to go today next week we'll look at validity and truth and then we'll look at the evaluations of deductive arguments.
好，我下周要做的是，我们会看有效性和真理，然后我们会看演绎论点的评价。
An inductive argument is more or less strong whereas deductive arguments are either valid or invalid. Okay What does an argument have to have in order it to be sound?
归纳论点或多或少有力，但是演绎论点有效无效，什么能说明论点完好？
You mustn't think that deductive argument is certain and inductive arguments aren't.
你不能认为演绎论点是确定的，归纳论点是不确定的。
You mustn't think that deductive argument is certain and inductive arguments aren't.
你不能认为演绎论点是确定的，归纳论点是不确定的。
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