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标题: argument completion drill [打印本页]

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作者: breew    时间: 2008-8-1 12:27
标题: argument completion drill

Premise:

P: r--->s

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Conclusion: S

I know the answer is R, but why the right answer also has

not R--->S

not S----> R

thanks.

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作者: 若老爷    时间: 2009-2-27 11:11
I also want to know why.

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