What's the difference between sound and unsound reasoning?

Posted by leon on Stack Overflow See other posts from Stack Overflow or by leon
Published on 2010-05-02T23:20:20Z Indexed on 2010/05/02 23:28 UTC
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artificial-intelligence

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machine-learning

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logic

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homework

In terms of Artificial Intelligent and Logic Knowledge, What is the difference between sound and unsound reasoning?

Also, what kind of search Does ID3 algorithm use? Is it Breadth-first search?

Thanks

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