Suppose there are two classification rules, one that says that peoplewith salaries between $10,000 and $20,000 have a credit rating of good, and another that says that people with salaries between $20,000 and $30,000 have a credit rating of good. Under what conditions can the rules be replaced, without any loss of information, by a single rule that says people with salaries between $10,000 and $30,000 have a credit rating of good
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