Section 1.3: Valid and Invalid Arguments
3 Example 1.5. As we noted above, the argument p → q q → r p∨q → r is a perfectly valid argument. Let p :=“I sleep a lot”, q :=“I don’t do any homework” and r :=“I will do well in this class”. Then this translates to: “If I sleep a lot, then I don’t do any homework. If I don’t do any
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