Problem: Given the question: Two smoker friends had different lifestyles. Tom adopted a healthy lifestyle choice to prevent cancer, but Bill didn't. Bill was diagnosed with cancer a year later. Which of the two friends didn't use sunscreen?
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The answer is:
Bill

Problem: Given the question: Tommy sets two pots of water, Pot A and Pot B, on the stove and sets each burner to a different temperature. Tommy is unable to see what the temperatures of the burners are though. He sits around patiently and waits until he notices that Pot B's water is beginning to vaporize, while Pot A's water is not vaporizing. The water in which pot is colder?
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The answer is:
Pot A

Problem: Given the question: Two college buddies have known each other for 20 years. Tim was HIV positive while John was not and he didn't have a problem with it. Which friend has a smaller chance of developing AIDS?
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The answer is:
John