Suppose each of the following three statements is true:
John is smart.
John or Mary is ten years old.
If Mary is ten years old, then John is not smart.
Which of the following is true and why?
a.) Mary is 10 years old.
b.) John is 10 years old.
c.) Either John or Mary is not 10 years old.
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Q: pls explain to me step by step. thanks
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